Electric Bicycle Batteries: Lithium Vs. Lead Acid Batteries. Biggest battery for ebike

Himiway Cruiser Battery Pack

This 48V, 17.5 Ah (840 Wh) Lithium-Ion battery pack with genuine Samsung/LG cells offers the best in class range and performance. The battery securely mounts to the base. It can be removed easily without disconnecting any wires to charge indoors or to switch to a fully charged battery for extended riding.

Features:

  • Weight: 9 lb
  • Total Battery Capacity: 840Wh
  • Easy to Install: Lockable and removable
  • Brand: Genuine Samsung/LG 35E cells
  • Indicator: In Built-in charge level indicator

Notes:

The battery cannot be returned. You can view our full return policy.

Please write your bike frame number and battery serial number in the note.

Customer Reviews

I was very glad to be able to get a new battery for my Himiway Cruiser. I had some vandals help me out there by trying to pry the battery apart. While it still seemingly works (those batteries are pretty tough) I am unsure about its waterproofing now. Good to note that if you leave the bike anywhere for a long time, take the battery with you.

Great product, Great quality! With this battery you won’t have to worry about running out of power, it gets to where you want to go!

How long does it take to receive a battery if I order a second one?ncohcohchoclhclhcohxyoclhclhcpychlchlcphdlhxhlclydoydlhcljdpydlhcjlcoydoyxlydlydyodlyflydoydlufluflufpufpufluflufph

Very quick shipping! Couldn’t have expected any quicker! 6 days for the bike and 5 days for the battery!

We LOVE our Cruisers! My wife and I have put over 700 miles on our Cruisers riding 2-track trails in the Colorado rocky mountains. I’ve had several issues with my Cruiser, but I would definitely buy another Himiway. We have been riding some steep and dusty trails, so I was not surprised when my motor had to been replaced at 500 miles because it was making noise. Customer service was very helpful and covered it under the warrantee. I’ve also replaced the brake pads twice, but that’s by choice. I do not wait until they are fully worn out. We don’t have the long-range batteries, we carry an extra battery. I suggest you DO NOT buy a generic battery pack, they do not have the same power or range of the Himiway batteries. I’m looking at the full suspension next.

Waiting to see if I can get a key! Then I can replace the battery pack. I ordered the key but not hearing anything about it.

The battery is very powerful. A full charge gets me over 40 miles of very hilly terrain. I personally think that there should be a more secure attachment mechanism to prevent theft. The locking plunger is easily retracted with a screwdriver or knife even after it’s locked. I found that out the hard way. This needs immediate improvement to prevent theft of the 500 batteries.

Himiway Cruiser Battery Pack

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Electric Bicycle Batteries: Lithium Vs. Lead Acid Batteries

When it comes to electric bicycle batteries, you’ve got two main options: lithium batteries and lead acid batteries. Sure, there are a few other types of ebike batteries out there, but the main two types you’ll see all over the place remain lithium and lead acid. Of course lithium batteries and lead acid batteries each come with their own distinct advantages and disadvantages, and knowing the difference will help you decide which is best for your ebike.

Lithium ebike batteries

There are many different types of lithium ebike batteries to choose from. I’ll give a short summary of the different types of electric bicycle specific lithium batteries here, but you can get a more detailed description as well as the pros and cons of each type of lithium battery in my article Not All Lithium Batteries Were Created Equal.

Lithium Iron Phosphate (LiFePO4)

LiFePO4 batteries are some of the heaviest and most expensive lithium batteries, but are also the safest and longest lasting.

Lithium Manganese Oxide (LiMn2O4) and Lithium Nickel Manganese Cobalt Oxide (LiNiMnCoO2)

LiMn2O4 and LiNiMnCoO2 batteries fall into the mid range of lithium batteries in terms of size, weight, safety, lifespan and cost. They are a good middle ground in nearly all regards.

RC Lithium Polymer batteries (RC LiPo)

LiPo’s are the smallest, cheapest, lightest and most powerful lithium batteries. Their disadvantages include short lifespan and propensity to combust into giant fireballs if not cared for correctly (I’m not kidding, check out the short video clip below).

Benefits of lithium batteries

Now that we’ve got the summary of different types of lithium batteries out of the way, lets look at how these lithium batteries stack up as a whole.

One of the first advantages of lithium batteries is their small size. You can fit a lot of lithium on a bicycle frame. This alone can give your ebike some seriously impressive range. Two or three mid to large capacity lithium batteries could easily fit on one ebike, giving potential ranges of 100 miles (160 km) or more. I guess this would be great for people that don’t mind sitting on their bike for three to five hours at a time, or that for some reason don’t want to charge up for weeks (hey, when riding your ebike through a zombie apocalypse, the last thing you want to be doing is searching for an outlet).

Lithium batteries made specially for ebikes often come with specific bicycle mounting points making them easy to bolt to the bike frame, seat post or rear rack. If you go with a different type of lithium battery without ebike specific mounts, you’ll likely have to put it in a bag on the bike, which is still a good option, and one that I even prefer sometimes. (Link to blog post of mine about center frame triangle batteries).

Lithium batteries are also small enough to allow you to place your batteries pretty much anywhere on your bike. This is especially true for people who want to assemble their own pack or use heat shrink wrapped lithium batteries instead of hard case lithium batteries with prefabricated bicycle frame mounts. This can help spread the weight around or hide the batteries to make a stealthier bike.

Lithium batteries (with the exception of RC LiPos) last much longer than lead acid batteries. LiPo batteries are usually only rated for a few hundred charge cycles but LiFePO4 batteries keep going after thousands of charge cycles. Every manufacturer rates their batteries differently, but most LiFePO4 ebike batteries will be rated for between 1,500 to 2,200 charge cycles.

Disadvantages of lithium electric bicycle batteries

A big downside of lithium batteries is that they are much more expensive than lead acid batteries. vary depending on the voltage and capacity of the lithium battery, but standard ebikes usually have lithium batteries starting in the 300 range and rising quickly from there. Most bikes I build have lithium batteries in the 400-500 range.

However, when you factor in the shorter life cycle of lead acid batteries, they become comparable to lithium batteries over the entire life of the electric bicycle. For example, a lithium battery may cost five times the price of a lead acid battery, but it could easily last five times as long as well, making the price about the same over the life of the lithium battery. You’d have to buy at least four replacement lead acid batteries (maybe even more) by the time your lithium battery finally kicks the can.

One other disadvantage of lithium batteries that isn’t talked about often, but should be, is their potential for theft. Lithium ebike batteries have become huge targets by bike thieves as a result of their combination of small size and high price tags (the same factors that keep shaving razor cartridges behind lock and key at the drug store). Thieves see an easy target and ample resale market, meaning you have to be extra careful about locking your ebike up and leaving it alone in public.

Lithium ebike battery partially removed from rack

Most lithium batteries that are designed to mount to ebikes also come with some form of locking system. These have varying degrees of effectiveness. The type with a little pin that slides into a thin sheet of steel are the easiest to steal by mangling the thin steel locking plate. Just take a look at your battery and ask yourself “how easily could I steal this battery if I had some basic hand tools and a 60 second window of opportunity?”

For this reason I like to either add a second lock specifically through the handle of my lithium battery (if it’s a removable style battery) or permanently secure it to the bike so it isn’t removable at all. The second option is less convenient because it means you have to bring the charger to the ebike, but it’s a much more secure option if you find yourself locking your ebike in public often.

Lead acid ebike batteries

When it comes to lead acid batteries for ebike use, you’ll generally be looking for what’s called a “sealed lead acid” or SLA battery. SLAs come sealed in a hard plastic case and can be turned in any orientation safely without leaking acid. This makes them appropriate for ebike use. Wet cell lead acid batteries, like many car batteries, would leak dangerous acid if turned on their side or upside down, making them a bad idea for use on an electric bicycle, which is a lot more likely to get knocked over than a car. Remember to stick with SLAs – not wet cell lead acid batteries – for electric bicycle use.

Lead acid batteries are much larger and heavier than lithium batteries, limiting their placement on ebikes. They almost never come packaged with ebike specific mounting hardware which means that they generally have to go in a bag on the rear rack or in panniers on either side if the rear wheel. Mounting them up high on the rack isn’t a good idea either because it will negatively affect handling. Generally speaking, you want to mount your batteries as low as possible to keep the center of gravity of the ebike lower towards the ground. This will significantly improve your ebike’s handling.

Advantages of lead acid batteries for ebikes

The biggest advantage of lead acid batteries is their price: dirt cheap. Lead acid batteries can be purchased from many different online retailers and local stores. Purchasing SLAs locally helps save on shipping and makes them even cheaper. Many hardware and electronic stores carry them. Even Radioshack has them, though you’ll pay more there.

Another advantage of lead acid batteries is their high power output potential. Lithium batteries generally don’t like to handle too much current. SLAs, on the other hand, can provide huge amounts of current. If you are planning a very high power electric bicycles, SLAs might be a good option for you.

Disadvantages of lead acid batteries for ebikes

One of the main disadvantages of lead acid batteries is their weight. There’s no beating around the bush here, SLAs are HEAVY, as you might guess by the inclusion of “lead” in the name. You’ll need a strong mounting solution on your ebike to handle the extra weight of SLAs. You should also be aware that lugging that extra weight around is going to negatively impact your range. The best way to improve the range of any electric vehicle is to reduce weight, and SLAs are kind of going the opposite way in that regard.

Another disadvantage of lead acid batteries is the shorter lifespan. Most claim to be rated for over 200 cycles, but in practice I usually find many SLAs start showing their age at around 100 cycles. They’ll still work as they get up in years (or charge cycles), but you’ll begin seeing your range quickly decreasing. If you were traveling 15 miles per charge when the SLAs were new, a year later you could find yourself barely getting past 10 miles.

SLAs come in 6V or 12V increments, meaning you have to build your battery pack by combining these smaller SLAs in series and/or parallel to get the specific voltage and capacity you’re aiming for. This can be both an advantage and disadvantage; it gives you more room for customization but requires some work to combine the individual SLA batteries together into a larger pack.

Who wins? That’s up to you

(…but it’s actually lithium)

When I’m experimenting with some new ebike parts and want to test different battery voltages for different speeds, I often use lead acid batteries because I can try many different voltages using very cheap batteries. Then when the results of my lead acid battery tests show me whether I want to go with 36V or 48V or 60V, for example, I then commit to buying the appropriate lithium battery.

There are only three instances where I recommend to use lead acid batteries instead of lithium

  • You are absolutely trying to build an ebike on a very tight budget
  • You are building an electric tricycle, which can easily carry SLAs without balance or stability issues
  • You want to test out different battery voltages on your system (make sure your controller can handle the voltage range)

For any other case, lithium batteries’ advantages greatly outweigh SLAs. Of course, for your specific ebike you might have other reasons that could sway you either way. At the end of the day, your ebike is all about you. I hope this information helps you make the right choice for your own battery needs.

About Micah

Micah is a mechanical engineer, tinkerer and husband. He’s spent the better part of a decade working in the electric bicycle industry, and is the author of The Ultimate DIY Ebike Guide. Micah can usually be found riding his electric bicycles around Florida, Tel Aviv, and anywhere else his ebikes wind up.

Комментарии и мнения владельцев

I have a GIO PB710/350w/500w bike. Is it possible to upgrade with a lithium battery? I mean Lithium battery will work with this or now?

Yes, you can upgrade a GIO PB710 with a lithium battery. You just want to make sure your battery is the same voltage as the original lead acid battery and that it can handle the current demanded by the bike’s controller.

Hi Micah, Do you have any charts showing the different weights by voltage for lead acid vs lithium? It would be good info to be able to see the penalty paid for cheap lead acid in a mid level build when compared to the equivalent lithium setup. I would prefer to go with lithium, but I have a couple of 75 volt (i think) cells from a UPS that are brand new. They are built from regular 12v (sixteen total) sealed lead units and would make the initial investment in an ebike that much more reasonable. One huge downside is that I hope to use the folding ebike in my homebuilt aircraft. As with ebikes, excess weight is to be avoided! As you sugested in one of your articles, using lead acid is a great way to prototype the build, so if I am happy with the performance if not the weight of the lead-acid, I can convert to lithium in the future and save some big weight. Thoughts? Jon

Yea lead acid is a great way to cheaply get into ebikes and test new motor/controller combinations. Keep in mind though that your performance will increase when you switch to lithium. It’s easy to do though, as the bike doesn’t care what chemistry it receives, it just sees volts and amps. Good luck!

Micah, I am new to the ofrum and to the ebike world so I would like to seek some advice please. I have recently bought a sondors fat bike to the UK and want to make some tweaks, I would like to upgrade the battery on a budget, I was thinking of 4 x 12v 5ah lead acid batteries in series, would this give me 48v 20ah or have I got this totally wrong? I want to replace the stock contoller for a 48v 25amp one, would this suffice? lastly it comes with a stock 350w bafang motor, if I make the battery and controller upgrades will the motor handle the increase in wattage? could I drill venting holes in the case cover to expell some heat? Your thoughts and advice would be most welcome, Regards, Wayne.

When you wire in series you only increase voltage, not amp hours. So you’d have a 48V 5AH pack in that setup. Not enough range, in my opinion. If you want my advice, the single best upgrade you can do to that bike is to replace the battery and controller for 48V units. It will give you about 30% more speed and power. You won’t need to drill vent holes or anything, that motor can handle 48V as long as you aren’t riding up any 5 mile long uphills with a 250 lb rider. Shorter uphills and flat land will be fine all day long.

Hello My friend I am having 36v lithium battery with 4.4 Ah(segway.balancing wheel battery pack ) but i want to convert this battery in to 36v with 9 ah is it possible to add one more 36v lithium 4.4 ah battery with this and i can use as 36v 8.8 ah battery. please help me iam not getting lithium battery in india for my e bike if am using SLA battery the distance coverage is very very less iam having 24v 250 watts brushless hub motor and 36v 500 watts hub motor please suggest me how and what battery i shoud use to cover atleast 25km thanks

You can certainly use a second 4.4AH battery in parallel to double your range, but you’ll want to make sure the batteries are at the same state of charge when you connect them in parallel, or use a diode in between them, to keep one battery from discharging the other if the charge states are unequal. The exact amount of range you’ll get per battery and motor varies greatly and depends on factors like terrain, speed, weight, etc. Suffice it to say though that if you double your current battery capacity, you’ll see an approximate doubling of your range as well.

Guide to e-cycle batteries

On new or recent e-bikes you invariably get some kind of lithium-ion battery. Older second-hand e-bikes may have other chemistries; the earliest e-bikes featured very heavy lead acid batteries.

Then came nickel-cadmium and nickel-metal hydride, both of which were lighter and can still be found to retain a useful amount of capacity for shorter runs – perhaps useful if you are looking for a cheap and cheerful second-hand ‘hack’ e-bike. Giant’s Lafree model and some Heinzman kits were highly regarded at the time and still turn up second hand with these nickel-based batteries.

However, despite the extra expense and complexity, a good-quality, decent-capacity lithium-ion battery is undoubtedly the most practical option. It will give you the best range, reliability and longevity.

You might read all kinds of claims for different variations of lithium-ion e-bike battery, with cobalt, manganese and more included in the mix. Don’t worry! There doesn’t seem to be any great expert agreement on which of these formulas is superior.

For now it’s more important to get a well-made, high-quality lithium-ion battery, regardless of the chemistry used. In practice this means batteries with cells – cells are the individual components of batteries – from reputable makers like Sony, Panasonic and Samsung.

Equally important is to buy an e-cycle with a high-quality electric drive system as this helps ensure the batteries have been assembled to a high standards. Well-known drive-system makers include Bosch, Brose, Fazua, Mahle, Shimano and Yamaha. All these manufacturers keep close control of the batteries used in their systems – in the vast majority of cases they will be own-brand batteries.

Guarantee small print

Remember to check out the particular terms of the battery guarantee.

Shimano’s e-bike batteries (select the battery capacity section) are guaranteed by charge cycles (full charges, so two charges of half the battery capacity would equal one full one) – at least 60% of capacity is guaranteed to remain after 1000 full charge cycles. Riese Muller guarantees that the Bosch batteries it uses will still have a capacity of 60% after two years or 500 charge cycles, depending on which happens first.

Your dealer should be able to determine the remaining battery capacity for you. Note that a good quality battery is still able to be used at below 60% capacity – probably for a good few years, it is just out of warranty.

For a very approximate idea of your e-bike battery capacity you can try the home test method.

Rear rack, frame-integrated or frame mounted?

There are three common mounting positions: rear rack, on top of the downtube or totally integrated into the frame.

The first option is OK for lighter batteries on lightly loaded bikes intended for more gentle riding and also causes fewer problems on e-bikes with smaller wheels, as the weight of the battery sits nearer the ground. If ridden heavily loaded the extra weight at the top and rear of the bike can start to affect handling, though.

Rack-mounted batteries are found on some good-quality budget e-bikes, however, and shouldn’t be discounted. Gazelle’s Paris C7 HMB is one good example.

Downtube-mounted batteries are still very common, but are slowly being overtaken by frame-integrated batteries. It’s somewhat ‘horses for courses’ which of these options you might choose.

Those mounted on top of the downtube can be less fiddly to get on and off the bike, but integrating the battery into the frame gives more protection from knocks and looks more aesthetically pleasing to many. Downtube-mounted and frame-integrated give better handling than rack-mounted batteries as the weight is kept low and central.

The tide certainly seems to be moving in favour of frame-integrated batteries, with many budget brands and online discount sites even selling such models, where once upon a time they were only to be found on premium-priced e-cycles.

What capacity do you need?

As a general rule it’s best to get the largest and best quality you can, as this will mean an easier life for your battery (fewer charge cycles) and also more range per charge.

Battery capacity is measured in Watt-hours (Wh) and 400Wh, 500Wh and 625Wh are fast becoming standard sizes. In 2022 Bosch announced its biggest battery yet: a 750Wh frame integrated model to be used only with its new ‘Smart’ system. Note that this battery is not backwards compatible, even though many earlier batteries were interchangeable.

You might want to go small, though. For example, on an extremely lightweight efficient e-cycle or a folding bike that needs regular lifting, to keep the purchase price down or if you simply know you’ll only be making short trips. The Cytronex C1 system is a good example of a lightweight, efficient system that can achieve impressive ranges on lightweight e-bikes from its modest 198Wh battery.

E-folders often use smaller batteries to keep overall weight down and keep them portable. The new Brompton Electric is actually one of the larger batteries found on a folder at 300Wh and neatly removes in a jiffy to help carrying.

Conversely, if you are after maximum distance on a single charge there are dual battery systems out there that mean you don’t even have to swap batteries. Bosch’s own dual battery system gives up to a massive 1250Wh capacity – enough to ride all day on high power settings – and it automatically draws power from both batteries at an even rate, the optimum method for giving your batteries an easy life.

A handful of brands have developed ‘range-extender’ batteries – smaller batteries that clip onto the bike frame ready to feed their power to the motor. Specialized has been using such a system for a few years on its lighter e-bikes, the Turbo SL range.

How many miles will I get from my battery?

How long is a piece of string? A very rough rule of thumb is to divide the Wh capacity of a battery by 15 to give a very rough estimate of the range (for example, giving an estimate of around 33 miles from a 500Wh battery).

Actual range depends on power level selected, rider weight, terrain and weather and can vary massively. Bosch’s Range Assistant is a useful guide to likely range as it lets you estimate the effect of various factors on range, though I have always found it a little on the optimistic side.

You can get many times more mileage than you might expect. For example, Cytronex has reports of fit road riders using their system and getting 50 miles plus to a charge on a 180Wh battery – less than half the capacity of many standard size batteries.

Conversely, an e-MTB ridden on high power settings over very challenging off-road terrain with a heavy rider could easily return a range of fewer than 20 miles on a complete charge of an average-capacity battery.

Tips for extending battery range include conservative use of the power settings and using the gears to keep the pedals spinning at a fairly fast cadence, as well as moderating your speed. Riding at 13mph instead of the max assisted speed of 15.5mph will usually save a good amount of battery capacity.

How to look after and store lithium ion batteries

There are a few basic but important tips you can follow in order to keep your battery in tip top condition:

  • Batteries have an optimum operating temperature – around room temperature. So charge and store the battery indoors in very cold or hot weather; avoid keeping them in direct sunlight.
  • If you are riding all year round and often in sub-zero temperatures it could be worth getting a battery cover. Fahrer makes a variety of covers from neoprene and cordura.
  • All batteries will be damaged if persistently over-charged or over-discharged. Use the correct charger for your battery; in particular never use one that wasn’t specifically made for your battery. If you buy a good-quality e-cycle in the first place they are more likely to have reliable battery management system (BMS) units in the battery which also helps prevent over-charging and.discharging.
  • Don’t leave a lithium battery connected after it has achieved full charge.
  • Be wary of cheaper batteries with suspiciously high claims for battery life and the number of charge cycles they will last – it may have been set close to the limits for under and over charging which could lead to premature failure.
  • Avoid vibration and shock to a battery through rough handling or careless treatment as this can lead to a shortened life, too.
  • Try to avoid long periods of storage as lithium batteries degrade slowly; but surely over time, whether used or not. If you do need to store one for a period of months, check what the maker’s recommended discharged state is for storage. For example, Bosch says that a charge status of approximately 30-60% of full charge is recommended for its batteries and that they are ready for use when they come out of storage.
electric, bicycle, batteries, lithium, lead, acid

End of life

Good-quality batteries are now more reliable than they have ever been. But even the best ones suffer a gradual decline in capacity over the years and so the range may eventually diminish to the point where it is unusable.

There three broad options if you need to replace a battery:

  • Replace under guarantee. This only really covers the situation if a fault develops – a good-quality lithium ion battery should last more than a couple of years if used properly, two years being an industry standard for a reasonable length battery guarantee.
  • Replace by purchasing a new one. If a battery is out of guarantee and at the end of its life then the industry advice is to replace it with one that comes from the same manufacturer and is of exactly the same spec. This is because battery, controller and motor have all been designed to work safely together and using a ‘non-original’ replacement pack introduces the potential for things not working as they should. Unfortunately, there are no common interconnectivity standards across the e-bike battery industry, with a multiplicity of computer chips and connectors used. One upside of total replacement is that you may have the option to upgrade to a larger-capacity battery from the same manufacturer.
  • While option 2 may be the ideal and is certainly the ‘official’ advice, there are an increasing number of e-bikes around that are many years old and for which the original battery is no longer made. There may be third-party batteries available for the commoner makes of e-cycle battery that you could buy off the shelf.

Recelling by an expert company may be an option. This is certainly the case in continental Europe where e-bike use dwarves that in the UK and where e-bikes have been around in large numbers for much longer, giving rise to a second-hand battery industry where a number of expert companies can supply replacement batteries or recell your old one.

In the UK the industry is younger and there are less expert companies around. They do exist, though, and London’s eBike Batteries often gets good feedback.

However, official industry advice is not to go down this route: non-expert, incorrect recelling or repair of a battery is most certainly a fire safety risk. However, there will be an increasing need for this service as the number of second-hand e-cycles whose original batteries are no longer made will increase dramatically over coming years and replacement batteries will be needed to avoid scrapping an otherwise perfectly good e-bike.

What’s the Best Battery Size for Your 2000W E-Bike? The Answer May Surprise You!

Who would have thought that e-bike could power such high-capacity motors and just take the whole cycling experience to a new level where you can enjoy high-speed and smooth rides without compromising on any other features?

However, what hampers this experience is battery management. Most 2000w e-bike users don’t know what size battery for 2000w ebike that’s why they don’t get excellent speed performance.

Let’s face it powering such a high-power motor is no joke especially when external factors like temperature, trail, and riding hours are constantly fluctuating.

We have already written about 1500w ebike battery size. In this article, we are going to discuss the correct battery size for a 2000w ebike motor and learn how we could excel in the battery size choice and its management for a 2000W electric bike.

Specifications of a Battery to Power a 2000W Ebike

Ideally, an electric bike with a 2000 watts motor needs a battery that is capable of supplying 2000 watts of output power to the motor so that the motor can utilize its full potential.

The motor power is probably the only thing we evaluate while deciding upon a battery size for your e-bike. However, there’s a lot more that goes behind it if you truly want to derive your 2000W e-bike’s utmost efficiency.

Pedal assist level affects the battery size

Apart from the motor power range, there’s one very specific component that we tend to miss out on. The pedal assist! Yes, have you ever thought why your e-bike battery drains faster as you switch to pedal-assist mode?

The reason behind this is nothing more than just a simple explanation that the motor consumes more power from the battery the higher your pedal assisting speed. This in return leads your e-bike battery to generate a shorter power range per charge.

Higher wattage motor needs more battery power

over, it is always a Smart move to filter through the supportive components of your e-bike and understand what role they play in the functioning of your battery’s performance.

Doing this only increases your high-power e-bike (like a 2000W one)’s chances to have more enhanced performance on the road but also ensures healthy battery size choices.

For example, when you question “ What size battery for a 2000W ebike?”, the motor becomes one of the crucial components to examine. A 2000W motor naturally requires a higher voltage rating battery in fact a minimum of 48V to 52V and the maximum can go up to 72 volts.

Controller vs Battery’s output power

Now why we talk about a range is an interesting discussion to have, most ebike users or cyclists divide the watt power of their e-bike by the voltage( minimum or maximum) to get an ampere rating of their battery size.

There is nothing wrong there but, don’t feel like you are missing something. The controller! The controller regulates the voltage and current supplied to the motor and it is designed to work within a specific voltage range.

That is why you must have knowledge about your 2000W e-bike’s controller and its speed and power output in order to protect the battery and motor from damage.

How to Calculate the Correct Battery Size for 2000W Ebike Motor

Finally, when you have looked into the specifications that make your 2000W e-bike battery size decision effective, you can calculate the voltage, and ampere range that suits your e-bike and its components the best.

What voltage battery does a 2000w ebike motor need?

Well, the battery’s voltage must be equal to the motor’s voltage. It means, if your 2000w motor’s voltage is 52v then you should go with a 52 volts battery.

Generally, the motor’s required voltage is always mentioned on the motor itself that you can easily find out. If it is not mentioned, I recommend contacting the motor’s brand to find out the voltage.

In my experience, the minimum voltage of a 2000w ebike motor is 48 volts and the maximum is 72 volts. If you select any voltage between 48v to 72v, the motor will run perfectly.

But also consider the controller’s voltage otherwise the battery would not work properly. Controller’s voltage must be equal to the battery’s voltage.

Ideal battery capacity (AH) for a 2000w electric bike

As you know that a 2000w ebike motor may have a required voltage of 48v to 72v. If your ebike’s voltage demand is high then reduce the AH and vice-versa. Because Watt-hour is the multiplication of volts to Ah of the battery.

Let’s take an example where the required voltage for a 2000w ebike is 48v to 72v. So we will evaluate the ampere ratings for the apt one.

Here, we assume that a 2000W e-bike is used for 1 hour at maximum power. Hence, the capacity holds as 2000W 1 hr = 2000Wh

  • 2000Wh/ 48V = 40 Ah approx.
  • 2000Wh/ 52V = 36 Ah approx.
  • 2000Wh/ 60V = 33 Ah approx.
  • 2000Wh/ 72V = 28 Ah approx.

As you can see as I am increasing the battery’s voltage, AH is reducing. Whether you chose a 48v 40Ah battery or 52v 36Ah battery or any of the above. All the batteries will provide a power of 2000 watts.

You know a higher voltage battery would provide more power to the motor, not the higher Ah. AH stands for the capacity of the battery, higher Ah provides more riding distance as it stores more current.

What size battery for 2000W ebike?

Hence, the battery size of your 2000W e-bike must be either 48V 40 Ah or 52V 36 Ah depending on the role of supporting components. Here, you could stick to the manufacturer’s guidelines for a final decision.

If you go with the higher volts then decrease the AH and vice-versa. However, if your goal is riding for long distances, a higher AH would be better because higher AH battery stores more battery power.

Don’t pair your 2000w ebike motor with the less voltage battery as it may damage the battery and motor. However, if you don’t want much high-powered battery then go with a less-capacity battery i.e., lower AH.

What Battery Size Adds Least Weight in a 2000w E-Bike?

Honestly speaking we have been getting more questions from cyclists on how to reduce the battery weight of such a high-power e-bike like a 2000W one rather than the correct battery size.

The solution to this is something we call “cyclists’ cheat codes.” Can you guess? The battery chemistry! One of the smartest ways to lower the added battery weight you get while handling higher-watt range e-bikes.

For the same, we recommend using a lithium-ion battery with a higher energy density. This is one of the lightest battery options amongst lithium-cobalt or lithium,-phosphate which is comparatively heavier.

over, you must keep in mind that the size of the battery impacts the overall weight of your e-bike regardless of the battery composition you stick by.

Apart from that a lithium-ion high-energy density battery is costly hence we always recommend our readers choose a battery size that meets the power-range requirement of the e-bike.

Crucial Battery Safety Measures for a 2000w E-Bike

It gets really important to be mindful of all the safety measures whenever you are riding such a high-capacity e-bike. Here are the must-follow battery habits for ensuring optimum safety in a 2000W electric bike.

  • Avoid Overloading the battery by exceeding the maximum load capacity.
  • Monitor battery levels (especially during long rides) by keeping the minimum charge level at 30% to 35% at all times.
  • If you use a lithium-ion battery, avoid extreme temperatures since it destroys the cells.
  • Always invest in a high-quality battery with UL certification.
  • Use the recommended charger by the manufacturer.

How Much to Invest in a Correct Battery Size: 2000W E-Bike Edition

Whenever there’s a question of getting a higher capacity e-bike battery the price range bothers the cyclists the most. On one side riders want the best quality battery for their 2000W e-bike whereas, on the other side, cyclists are really debating how much they should invest for their battery.

Now for an overall estimation, the cost of a 2000W e-bike battery could lie anywhere between a few hundred dollars to a little above one thousand dollars.

However, there are several factors such as the brand, battery capacity, and other features that determine the price range of a 2000W e-bike battery.

We expect our readers to invest in a UL-certified high-quality battery since it minimizes damage chances and also ensures a longer lifespan.

Hence, such a battery that gives enhancing performance, safety, and a longer lifespan could cost somewhere between 500-800 and 800 to 1200 range.

Our suggestion would be to invest in a 500 to 800 range for the best-suiting 2000W e-bike battery.

Conclusion on Correct Battery Size for a 2000w Ebike

Dealing with higher-watt e-bikes does make most riders cautious and especially the battery aspect of it since there are so many factors that matter for a correct battery size selection.

We tried our best to highlight the crucial components of the same and hope this helps you in your 2000W e-bike battery size selection. Keep Riding!

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FAQs: What Size Battery for 2000w Ebike Motor

What is the maximum speed can a 2000W e-bike reach?

A 2000W e-bike assisted with a 48V 40 amp battery could reach up to the speed of 43 mph to 47 mph easily under normal trail conditions.

What is the legal voltage range for e-bikes in the USA?

In the States, for all class e-bikes, the legal voltage range is between 36V to 48V. Any higher voltage range on an e-bike is considered illegal. Learn more.

How much battery capacity can damage my 2000W e-bike?

Even though a 2000W e-bike motor has a larger capacity to hold power, a battery capacity above 52V would drain a dangerous amount of power from the motor and eventually damage it.

Can I use a less than 2000w battery with a 2000-watt motor?

Yes, you can use it. Make sure you reduce the AH only, not the voltage. Voltage must be equal to the motor’s voltage.

Can I use a higher than 2000w battery with a 2000-watt motor?

Yes, you can do so. Make sure you increase the AH instead of increasing the voltage of the battery. I mean select a battery voltage equal to the motor’s required voltage. If your motor’s voltage is 52v then select a 52-volt battery.

Bittoo Gupta

I am the founder and editor of The Bike Fetcher, a passionate E-Biker. My passion for E-bikes led me to build this blog site where I share electric bike news updates, my e-biking experience, e-biking tips, e-bike battery tips and help people to get the best e-bike. Feel free to contact me on my social accounts or through the contact form.

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