Dolphin Pre-sale Now. Double battery electric bike

Dolphin. Pre-sale Now

Folded Size: 3314.528.5 in1.Max Handlebar Height:39.76 in2.Min Handlebar Height:32.48 in3.Standover Height:21.50 in4.Max Saddle Height:39.76 in5.Min Saddle Height:32.00 in6.Wheelbase:42.25 in7.Reach :22.50 in8.Width:25.00 in

Shipment:Ship within 48 hours

Once your order is received, a confirmation will be sent by email or text, it takes us 48 hours to prepare your order, and you will be notified as soon as it ships.

Orders placed on weekend will be arranged on next business day.

Please obey the laws of your state. Ride safely, wear a helmet



One 48V 10.5AH lithium-ion battery, one 7AH optional lithium battery, charging time of 4-6 hours, and a range of roughly 80 miles.

The new Dolphin and Dolphin Plus have the same frame design, allowing it to be upgraded to a dual-battery version by purchasing a dual-battery kit.


Climb hills and traverse crossroads smoothly and efficiently, powered by our custom 500W motor from Qualisports USA, which is designed in-house to help you go steeper at a lower speed.


With fluid in the master cylinder, hydraulic brakes have a much more efficient braking mechanism to force the brake pads together when the lever is pushed.

Multiplying the amount of effort put into the lever makes it easier to brake.


The LCD display lets you easily see some parameters like battery capacity, current speed, pedal assist level, and travel distance.

It has a USB for your phone charging.


Battery TypeSamsung Lithium-ion BatteryBattery CapacitySeat post battery 48V 10.5Ah; Tube battery: 48V 7AHCharging Time3-4Hrs/Dolphin; 4-4.5Hrs/Dolphin PlusMotor BrandQualisports USA Custom Manufactured 500WMotor Torque80 Newton metersMax. Speed 20 mphDisplay BrandKT-7 LCD Display with USB Chraing PortDrive ModeCadence Sensing Pedal Assist/Trigger Throttle (12 Magnet Sealed Sensor)-Normal Biking-Cruise-Walk Assist

Size 63.50” x 25.00” x 44.09”Folded Size33″ x 14.5″ x 28.5″Net Weight51 lbsMax. Load300 lbsFrame TypeMid-Step, FoldingSaddleKNUS, ActiveSeat PostCustom, 57mm, Alloy (Contains the Battery)Brake DetailsCustom 2 piston Hydraulic Brakes with power coutoffGearing Details7 Speed 1×7 Shimano Tourney Derailleur, MF-TZ500-7 14-28 Tooth CassetteCranksProwheel Forged Alloy, 170mm Length, 52 Tooth Chainring with Plastic GuardTire BrandINNOVA, 20″ x 2.30″

How far can Qualisports bikes go on a single charge?

Distance differs on the terrain, weight of the cyclist, and the power mode you are using (pedal only, full Throttle, or pedal assist).

For a Single-battery Dolphin: The range is about 25 to 60 miles on a single charge using primarily electric power. For a Dual-Battery Dolphin: The range is about 40 to 80 miles on a single charge using primarily electric power. If you use the PAS, mileage can increase. Some riders can achieve over 60/80miles when cycling in pedal-assist mode.

How to turn on/off the front headlight?Turn on the LCD display, hold the display’s UP button for 2-3 seconds, the headlight/LCD display background light will both be turned on. Hold the power button the same way to turn it off.

Is the bike pre-assembled?95% of the bikes are pre-assembled, with detailed installation videos for the front and rear fenders.

Overview of Dual Battery Solution and Range Extender Battery

Some e-bike riders need a longer range for their e-bike. The mtb user wants to have more fun on the dirt roads or e cargo bikes users need to carry more goods for long rides. What would be the perfect solution for them to have a range boost for their e-bike? Dual battery and range extender?

Discover more about dual battery solutions from LEV battery manufacturer.

What are Dual battery system types?

There are two dual battery setup types: parallel (dual battery) and power bank (range extender). The main difference between them is how they operate as well as how much power each type can produce.

Choose and click to discover more about dual battery products.

Both types were designed to solve a problem, but it came down to personal preference for those who purchased e-bikes equipped with two e-bike batteries or range extender batteries.

dolphin, pre-sale, double, battery, electric

The parallel battery type

We have the battery control unit fully integrated with the BMS. It will optimize the use of both batteries and keep them at the same voltage when they are connected. With two batteries in parallel, the output voltage is the same as one battery, but the amp hours are doubled.

This way allows both battery discharge at the same time and has twice the range or power of a single battery. It increases the total capacity directly.

Another way is having only one battery power the e-bike, and automatically switch to the second battery when the first one is out of power. Also, it can be switched manually as well. Each battery in a dual battery system can power the motor independently.

Both ways can give riders more battery capacity and more range for a smooth ride. For dual battery system, it will also improve the acceleration of your e-bike.

Advantages of an e-bike Dual battery

A dual battery system offers several advantages over just one battery system. This is especially important for those who want to ride their electric bikes for long distances.

The dual battery system is a more permanent solution. Once it’s installed, it will be there as long as riders own the specific bike. In other words, riders can FOCUS on the riding experience without worrying about the charge level or when to recharge the battery. With eco mode, riders can have even longer rides.

For example, dual battery systems can provide longer run times, more power, and greater flexibility. The Bosch dual battery system is a great example.

They can also be used to store energy from solar or wind systems, providing a backup power source in the event of an outage. Dual battery systems are the best option for those who want the most from their e-bike.

Disadvantages of a Dual battery system

A dual battery system has a few disadvantages.

First, it can be more expensive than a single battery system, because you need to purchase an extra battery.

Second, it can be more complicated to install and design. And require a spare battery control unit or fully integrated with BMS.

Finally, it can add additional weight to the e-bike, which can affect performance.

However, these disadvantages are outweighed by the many advantages of dual battery systems.

The range extender type

The range extender is a second battery, that is plug-in with the main battery. When the main battery is getting low, the range extender battery can start to charge the main battery. It works as a “power bank”.

The range extender battery usually has a smaller capacity than the main e-bike battery. When the main battery is drained, the range extender battery will start to power charge the main battery. Some systems may require the e-bike to stop when charging the range extender battery.

Advantages of a range extender battery

Riders will not need to modify their e-bike or dual battery system. Just mount it on the down tube or top tube. Even can work in their backpack.

Also, thanks to the smaller capacity and size, it is easier to carry with riders in their backpack. While riders check the view or take a lunch break, it will start charging. After that, they can take the ride again.

It is affordable, easy to use, and a readily available way to increase ride quality.

Disadvantages of a range extender

Just as with any other product on the market, there are a few disadvantages that come with using a range extender battery. Depending on your needs, it may or may not be a major drawback.

The main disadvantage of the range extender battery is that you will have to keep charging two batteries separately, which can quickly become tedious and time-consuming if they’re drained at different times.

Another issue with the range extender is the charging rate. Because it works as a power bank, it usually takes the same amount of time to fully charge your main battery as using the normal charger. If you are doing a lot of climbing with your e-bike, the range extender may not have enough power to keep up.

The last part is if the main battery is dead, the range extender may not power your e-bike directly.

Despite these few disadvantages, the range extender battery is still a great option for those who want to extend the range of their e-bike.

Which Dual or Range extender battery type should riders choose?

There are advantages and disadvantages for both dual/range extender battery types which will depend on your product preference as well as what you plan on designing the electric bike for.

The best thing that can do is to test out different dual/range extender bikes to see how they feel while riding them because it may come down to comfort rather than what looks cool or has more power output.

Also, don’t forget about the price! Even though it might look like dual batteries are the way to go, you may find that a range extender battery might be compatible with your existing product line.

The future of electric bikes

The dual battery system (two parallel batteries or battery range extender) has the potential to take electric bikes into the next generation. This system provides both high power and extended range, which is what you need for an e-bike to become your primary mode of transport. This means that in the future there may be more e-bikes with dual battery systems than those using a single battery.

The dual-battery system is not only more powerful, but it is also easy to maintain and service. This means that there is less chance of a breakdown.

dolphin, pre-sale, double, battery, electric

And you will spend less time and money on repairs. So overall, the dual-battery system provides many advantages – making it the better option for your e-bike.

Tritek solution

Range extender with Smart BMS. It works as a power bank and can work with many popular systems and recharge your main battery.

It has 180 watt-hours of energy and supports up to a 3A discharge rate as a power bank. A suitable solution for your current product line. It is perfect to place on the bike down tube or water bottle holder. Easy fit in different frame sizes.

Tritek also provides a dual battery setup. With our new BMS battery technology, it can safely switch or parallel. The frame battery’s low-weight design can increase range without too much additional weight.

Dual battery systems are the best option for those who want the most from their e-bike. Compared to a range extender battery, dual batteries offer longer run times, more power, and greater flexibility.

However, depending on your needs and riding style, they may not be a deal-breaker. If you have any other questions about dual-battery for e-bikes or range extenders, feel free to contact us for further information.

Thank you for reading! We hope this article has helped inform you about the advantages of dual-battery E-bikes. Stay safe and have a great ride!

Review: 32 mph Super Monarch AWD full suspension dual battery e-bike

Lately I’ve been riding the 1,000 W Super Monarch All Wheel Drive (AWD) dual suspension electric fat bike from Ecells. And I’m finding it difficult to put into words how crazy and fun this e-bike is. But since that’s technically my job, let’s give it the ol’ college try.

I first tested this e-bike in its prototype form earlier this year. And while the prototype for the Super Monarch was quite good, the production version is so close to perfect that we’re starting to split hairs.

Now the first thing to know about this ride is that it is a tank of an e-bike.

We’re talking dual motors. Dual batteries. Dual suspension. Dual fat tires. Basically, take the most fun you’ve ever had on an e-bike and double it, because that’s what the Super Monarch has in store for you.

Check out my video review below, then read on to get the entire picture.

Getting the full experience

One of the things I loved the most about testing out the Super Monarch is how well it works both on and off-road.

While I loved riding it around the trails, I still have to take roads to get to some of my favorite places to ride. And instead of putting the bike in a car or truck and driving to my favorite playgrounds, I just pegged the throttle and rode straight there. With 1.5 kWh of battery, I knew I could make the 5-10 mile road trip, ride around on the trails until I got tired, then hit the road to head home – all on a single charge!

While the bike does come factory limited to 20 mph (32 km/h), it’s simple enough to enter the display settings and unlock the top speed. That allowed me to reach up to 32 mph (52 km/h) on the pavement.

Please note though: you shouldn’t travel at these speeds on shared trails where you could unexpectedly come across other bikers or hikers. I rarely hit those speeds off-road, and the only times I did were when I was on long straight farm trails where I could see hundreds of yards ahead and didn’t risk surprising anyone (or myself) with an unexpected encounter. Please ride responsibly.

Anyways, where was I? Oh right, the awesomeness. So I could fly down the road, out accelerating cars all the way to my destination. They rate this bike as a 1,000 W machine (dual 500 W motors), but that’s obviously continuous power, not peak power. Based on the power meter on the digital display, I could see my peak power hitting just shy of 1,500 W during acceleration. When the lights turned green, cars only passed me once I hit my top speed and they could catch up and overtake me at higher speeds.

And while on the road, the dual suspension and fat tires made me feel like I was riding on something with the comfort and stability of a motorcycle. Potholes, curbs, speed bumps, and everything else were mere blips to me. If I was on my electric road bike or even lighter electric mountain bike, I would have had a much healthier level of respect for such obstacles. But the Super Monarch just seemed to erase them from my path. I couldn’t wait to see what it could do with more technical terrain.

And I was absolutely not disappointed. Once I hit the trails, I felt like I was on a dirt bike flying up climbs. I couldn’t help but consider how much less fun those same climbs would have been if I was forced to summit on pedal power alone. Though I didn’t mind using the pedal assist either, especially since the PAS could do the majority of the work for me if I set the level high enough. C’mon, I don’t want it to make too much of an honest man out of me!

The pedal assist uses a cadence sensor, not a fancier torque sensor, which means there’s a bit of lag when you first start pedaling. The system takes about a second to kick in the power once your pedals beginning moving, which can be a bummer if you needed that power right then at the start of a climb. But you can always blip the throttle if you need immediate power and then your pedal assist will be there a second later.

So while a torque sensor would have been a nice upgrade, I probably wouldn’t have wanted the extra cost associated with it. And the Super Monarch is already a bit pricy as it is, at least compared to more budget-level offerings.

There’s a slightly lower power 700 W version (which is honestly probably enough for most people, considering this model’s excess power) which starts at 2,795. If you want this 1,000 W version, it will set you back 3,195. Though considering the dual motor, dual battery, and dual suspension set up, that’s actually a great price. And no one is paying me to say that (Electrek doesn’t do paid reviews). That’s my honest opinion. We’re talking about high-end hydraulic brakes, shifters, 1.5 kW of peak power, triple the battery capacity of most e-bikes, etc, etc, etc. Considering that this is a bike that can cover anything and go anywhere, these are some pretty reasonable prices.

There’s also a cool deal running right now where customers get around 150 worth of free accessories, including panniers, gloves, cargo net, helmet, toolkit that mounts to the rack, and more. So the deal just got a bit sweeter.

Now all of that being said, the Super Monarch still isn’t perfect.

For one thing, it’s heavy. Like, over 90 lb heavy. You can take around 20% of that weight off by pulling out the batteries, which might help when you need to lift the bike onto a car rack or into a truck, but it’s still a heavy bike.

If you were trying to do jumps and other acrobatics, you’d probably notice it more. I did some small jumps but nothing major, as I was mostly keeping both wheels on the ground. And considering the higher power of the bike compared to most e-bikes, I didn’t really notice the weight much while riding. Yes, the rear battery is mounted fairly high up. But because the rack is quite rigid, it didn’t affect the handling too much for me.

Again, if you’re at competition level then this setup might hold you back. But for most casual riders looking for a recreational ride, the weight distribution isn’t going to affect your performance much. You’ve probably got a 150 or 200 lb of meat centered above the top tube – a 10 lb battery just isn’t going to be as noticeable as people think.

The other thing is the bike draws a lot of attention. While that’s sometimes fun, other times I’m trying to be a bit more stealthy. I ride in many places where it’s totally legal to ride, but that doesn’t mean I won’t get snide Комментарии и мнения владельцев or dirty looks from cyclists that still look down on e-bikes. And even though I make sure to ride respectfully when I’m near other riders and hikers, they will often assume I’m out there to be a hooligan.

But at the same time, I love the boldness of the bike and I still think it’s fun when I’m riding through town and I see heads turning left and right. And I’ve met a ton of nice people who come up and ask questions while I’m parking and locking my bike. So attention-grabbing e-bikes can go both ways.

Essentially, there’s a lot to love about this bike. It’s hard to find a more fun trail bike out there that can match these specs.

What do you think of the Super Monarch? Let us know in the Комментарии и мнения владельцев below!

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ebikes should support dual-batteries to encourage longer trips

Story by

Napier Lopez

Napier Lopez is a writer based in New York City. He’s interested in all things tech, science, and photography related, and likes to yo-yo in (show all) Napier Lopez is a writer based in New York City. He’s interested in all things tech, science, and photography related, and likes to yo-yo in his free time. Follow him on

Range anxiety isn’t just an issue for electric car drivers — electric bike riders suffer from it too. That’s a bit of a problem if we want ebikes to serve as veritable car replacements, as too often consumers have to choose between an affordable, lightweight ebike and something with more range.

Barring dramatic advancements in battery technology, this isn’t likely to change anytime soon. But there’s another way to deal with this problem: every ebike should let you latch on an extra battery. Too few do.

I test a lot of ebikes for TNW, and I love going on long rides on whatever ebike I happen to be reviewing a given month. I go on 15-40 mile routes regularly, and because ebikes take the edge off of long trips, my average distance increases every month.

The problem is, most of the bikes I test can’t actually take me as far I’d like to go. It’s no fun pedaling a 70-pound no-longer-electric bike if you overestimated how long your battery would last — I know from experience — and unless you have a folding bike, it’ll probably be difficult to find public transit options to get you back home.

Most journeys are round trip after all, so while you might be able to travel 20 miles one way, you might not be able to make it all the way back if you couldn’t recharge your battery at your destination.

Sure, there are single-battery ebikes with super high range out there, but they are usually super heavy, which works against you if you do deplete the battery. They can also get pretty expensive, as the battery is often, if not usually, the most expensive component of an ebike. Among lighter, more affordable ebikes, dual battery support is almost non-existent.

dolphin, pre-sale, double, battery, electric

It’s a shame. If range extender batteries were more common, users would have a lot more flexibility with how they use their ebike.

For one, riders could save money by initially opting for a bike with a smaller battery and buying the range extenders when they’re financially prepared. The more people ride ebikes, the further they go, but they can also hit a wall once they start pushing the limitations of their battery’s capacity. Offering range extenders would be an easy way for riders to ‘upgrade’ their ride down the road without having to buy a new ebike altogether.

Of course, you could always just buy a second battery if your ebike offers a removable battery. But many do not, and in any case it can be awkward to carry a heavy second battery in a backpack or on a frame that isn’t designed for it. Making dual batteries an intentional feature, rather than something users have to jerry-rig, encourages these longer trips.

Bikes like Biktrix Juggernaut Duo and Juiced Hyperscrambler 2 offer more flexibility by allowing you to carry two batteries right on the frame. It means you can save some weight for smaller trips where you don’t need the second battery, or carry both for the longer rides.

Range extenders are arguably even more useful for the lighter ebikes, which often sacrifice range and/or power in the name of ride quality, and which often use integrated batteries that are hard for riders to remove. The VanMoof S3 and Specialized Turbo Vado SL, which both use fixed primary batteries for a more stealthy design, address these issues by offering range extenders. In these cases, the availability of a range extender battery means apartment dwellers can leave their bike in a storage room and only have to carry the range extender up five flights of stairs.

And it’s not always about going as far as you possibly can; you might also appreciate the option for a second battery if you need more power from the motor — say if you have a distant commute, if you live in a very hilly town, or if you are a larger rider like me. On most ebikes, range can vary dramatically depending on the assist level; you might go 50 miles on the lowest assist levels, but just 15 in assist level 5.

I know some of you are twiddling your goblin-esque fingers as you prepare to comment ‘jUsT rIdE a NoRmAl BiKe.’ That misses the point.

We all benefit from getting more gasoline-powered cars off the road, and ebikes actually appear to be replacing more cars than they are regular bikes. Studies have also shown people tend to ride farther and more often on ebikes. In other words, people are taking trips they wouldn’t even consider on a regular bike.

With ebike adoption rapidly increasing, it’s only reasonable to assume that more people will want to take even longer trips on two wheels, especially if cities continue to build the infrastructure necessary to support these journeys. Making these long journeys more viable for riders helps make our cities greener and lessens our reliance on cars even further.

All this is to say that an ebike’s range can make or break a purchase; it doesn’t matter how much you like an ebike if it can’t take you as far as you want to go. Making dual batteries the norm would give consumers more flexibility in what they buy — and how far they ride it.

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