Is range anxiety limiting your rides? Cruise longer on your fat tire e-bike or another electric bike with a backup battery. You can also replace the original battery with one that’s even better. The best batteries cost a fraction of what you spend on an electric bike and are valuable investments for your active lifestyle.
Want an electric bike? Check out our best electric beach cruisers guide, with fun and stylish options for everyone.
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Amazon Customer Reviews
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Amazon Customer Reviews
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Amazon Customer Reviews
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Amazon Customer Reviews
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Price: $549.00 Shop now at Rad Power Bikes | Shop now Read our review |
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Price: $349.99 Shop now at sixthreezero | Shop now Read our review |
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1. EDITOR’S CHOICE: Unit Pack Power Jumbo Battery
Pros:- Built-in USB port charges phones
- Rated up to 1,000 charging cycles
- On/off button conserves power
Cons:- Doesn't come with mounting bolts
- Not built for heavy rain
- Cumbersome
Get extended performance from the UPP Jumbo Shark Battery Pack, which can last over 1,000 charging cycles. That’s at least 5+ years with regular use. Conveniently, you can use this power pack on a wide range of bikes. It’s suitable for 500, 750 and 1,000-watt motors and works with many mainstream brands, including ANCHEER electric bikes and ECOTRIC e-bikes. Reliability and convenience are big factors in a second eBike battery, which is why this one is our top pick.
This specific battery is rated for 48V 13Ah and 30 amps. Other options are available, including a smaller 36V 15Ah battery and a beefier 52V 20Ah battery. The smaller one could be good for an entry-level e-commuting bike, while the biggest battery can power a fat tire e-bike. There are also several other options in-between.
Concerned about carrying extra weight? The most powerful batteries are often heavier. For example, the heftiest batteries can weigh up to 10 or 12 pounds. It’s something to consider if you’re going to be carrying a spare power pack.
Rest assured your battery will be safe if you need to stop during your ride, as you can securely lock it on the frame using the included keys. You’ll also find an integrated USB port to charge your phone and an LED battery indicator.
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2. RUNNER UP: QZF 48V 1000W eBike Battery
Pros:- Locks securely onto the frame
- Secure base connection eliminates bad contacts
- Durable plastic shell won't overheat
Cons:- Takes awhile to recharge
- Warranty is only 1 year
- May not work with some popular brands such as Shimano and Bosch
Get more miles out of each ride with a versatile backup battery. This QZF lithium-ion battery fits a wide range of motors from 250 to 1,000 watts, making it well-suited for entry-level rides and premium ones.
There are several variations of this e-bike battery. This particular model is a 48V 13AH 1000-watt powerhouse that will extend your road and trail adventures. It’s been upgraded with a more secure base connection to virtually eliminate bad contacts.
When you’re spending this much money on a second battery, you want to make sure it will last. This one will last over 1,000 charging cycles, or 5+ years with normal use. It also dissipates heat better than the last model for longevity.
This battery can keep you cruising between 45 and 85 miles, depending on factors such as weight and riding conditions. Other versions offer different ranges. An integrated light alerts when the battery is running low. You’ll need to set aside up to eight hours for the battery to fully charge.
An included key secures the battery to the frame for peace of mind. 5V 1.5A USB charging socket to keep your smart devices juiced up on the go.
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3. MXS Ebike Battery
Pros:- Indicator lights show battery status
- Lasts over 1,000 charging cycles
- Waterproof construction offers protection during rain
Cons:- Warranty is only a year
- Not available without a USB port
- Slightly heavy
Available in configurations from 36V 10Ah to 52V 13Ah, the MXS Ebike Battery fits most bikes. The smaller 36V batteries fit most motors up to 500W. If you need more power, the 52V battery is ideal for 1000W motors. You’ll get around 25 to 35 miles per charge depending on your weight, speed and road conditions.
A unique wavy design prevents the MXS battery from sliding around inside the frame. This will help you feel more confident on rough roads and trails. It also withstands the elements with waterproof materials. A hard plastic shell protects the battery from road and trail debris.
You’ll need to set aside around five hours to charge, or until the LED lights turn green. The MXS is rated for over 1,000 cycles or five years. Each battery has a USB port to keep your smartphone topped up throughout the day, so you can easily get in touch with loved ones at any time.
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4. BtrPower 36V & 48V 10Ah Lithium-ion Battery Pack
Pros:- Compatible with 250 to 750-watt motors
- Lasts up to 30 miles without pedaling
- Durable ABS case for extra protection
Cons:- Bulky design
- Doesn't come with mounting bolts
- Some competitors have higher Ah ratings
The BtrPower pack is ideal for commuters. It’s compatible with 250- to 750-watt motors and comes in two sizes to fit many different bikes. Just plug it in when you get to the office or home, and it will be ready to go in just 3.5 hours.
Ranging from 36V 10Ah to 48V 10Ah, there are many variations. If your bike’s motor doesn’t exceed 750 watts, you can extend your riding time by several hours. Even the most powerful model weighs just 4.4 pounds and is easy to carry as a spare.
The 36V battery offers an additional 30 miles of extra range without pedaling. You’ll get an extra 20 to 30 miles with the 48V version. Both batteries retain 80% capacity after 1,000 charging cycles, ensuring they’ll last for years with regular use.
Worried about getting caught in the rain? This battery is waterproof and is enclosed in a durable ABS case that can withstand rain and water. Pair it with your electric assist mountain bike or your fat tire e-bike for a fun off-road adventure.
Don’t worry about holding back out on the road or trails, as this battery features a BMS protective board to prevent overcharging. It’s also covered by a 1-year warranty for peace of mind.
Buy the BtrPower 36V & 48V 10Ah Lithium-ion Battery Pack here.
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5. Rad Battery Pack
Price: $549.00Pros:- Batteries are removable for charging
- Includes two keys for added security
- Dependable Samsung 35E cells
Cons:- Not compatible with 2017 or older models
- Batteries can't be returned
- Shipping isn't free
Keep your favorite Rad Power e-Bike running strong with the appropriate Rad Battery Pack. Depending on your bike, you can use Standard or RadMission 1 packs for your e-bike.
The Standard pack is a 48V 14Ah 672Wh battery that works with Rad Power bikes dating back to 2018. It’s not compatible with the RadMission 1 or RadRover 6 Plus ebikes.
If you own a RadMission 1, the corresponding 48V 10.5Ah 504Wh battery pack is for you.
There isn’t a huge weight difference between the batteries. Standard weighs 7.7 pounds while the RadMission 1 battery weighs 7 pounds. You can easily remove the batteries for charging as needed. These batteries are lockable and removable and come with two keys for enhanced security.
Both batteries contain dependable Samsung 35E cells and have an integrated charge level indicator to let you know just how much juice is left.
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6. Yose Power eBike Battery
Pros:- Lasts over 1,000 charging cycles
- Compatible with most bikes
- Comes in many sizes
Cons:- Relatively heavy
- Takes up to seven hours to charge
- Doesn't have brand name cells
Most ebikes have a battery on the downtube, where it’s convenient to charge and replace. This Yose Power battery will fit snugly onto your frame as long as you have a secure place to put it. You can also easily transfer it between bikes.
On a full charge, you’ll get up to 30 miles on full power mode and at least twice that distance on eco mode. That’s a huge range that will easily extend a fun day out exploring the trails. You can choose the amount of power you need at any time to conserve battery life.
It’s also a practical long-term investment. This battery retains over 70% capacity after 1,000 charge cycles. Unlike some smaller batteries, which may only last for 600 charges, your original Yose battery can last for years. An 18-month battery warranty provides extra peace of mind.
Downtube batteries are convenient, but they’re exposed to the dirt and debris that can fly when you’re having fun. All internal components are properly shielded against potential damage from rocks, dirt and dust. The battery is also waterproof. An innovative smart BMS protection system prevents overcharging.
If you’re planning on carrying this battery as a spare, keep in mind that it weighs nearly 7 pounds. That includes the holder. A backpack or even a rear bike rack can help safely store your belongings.
It takes around seven hours to recharge this battery, which is slightly longer than some others on our list. LED indicator lights show how much juice is left. If your phone battery dips when you’re out and about, just use the included charging socket.
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7. sixthreezero Battery for Electric Bikes
Price: $349.99Pros:- Fits most popular sixthreezero bikes
- 250-watt batteries last up to 1.5 hours per charge
- Get up to 40 miles on pedal assist mode with the 500-watt battery
Cons:- Battery weight isn't listed
- Limited to single options for each battery
- Exclusively for sixthreexzero bikes
Power your electric bike with this sixthreezero ebike battery. Choose between 250- and 500-watt batteries depending on which one works best with your bike.
The smaller 250-watt battery has a 36V and 10.4Ah rating, which is plenty for most rides around town. Pair the battery with a bike such as the AroundtheBlock 250W Electric Cruiser Bike to keep the momentum going for hours.
Each 250-watt battery lasts up to 1.5 hours per charge. You can cruise up to 15 miles on full electric and 15 to 30 miles on pedal assist mode.
There’s also a 500-watt battery. This e-bike battery packs a more powerful punch with 48V 10.4Ah for maximum performance. Pair the battery with a bike such as the EVRYjourney 500W Electric Hybrid Bicycle to confidently ride up steeper hills and enjoy longer outings in the saddle.
With a more powerful 500-watt battery at your disposal, you can cruise up to 20 miles on full electric and up to 40 miles on pedal assist mode.
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8. ModWheel 48V 11.6AH Li-ion E-Bike Battery
Price: $419.95Pros:- Won't overheat on longer rides
- Powers up to 1,000-watt motors
- Can be charged over 800 times
Cons:- Not for 36V electric bikes
- Only lasts an extra 14 minutes or so
- Pricey
ModWheel is popular in the world of ebike conversion kits, but its replacement ebike batteries are just as dependable. This ModWheel 48v ebike battery isn’t cheap, but you get what you pay for in terms of performance and overall quality. You can also use this battery with a variety of bikes and motors, including 750-watt motors and bigger 1,000-watt motors.
Details matter if you’re looking for the best battery for your electric bike. This ModWheel battery is housed inside a plastic case to avoid overheating, even when you’re out for the day. It also weighs just 6.5 pounds for easy carrying. An expected lifespan of 800 charging cycles means you can count on this battery for years to come.
In terms of performance, you can cruise around 14 extra miles, depending on your bike. An on/off LED button clearly indicates the charging status. There’s also a locking key for added security.
When the battery runs low, it requires around five hours to recharge.
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9. Ecotric 36V 12.5 Ah (450 Wh) Lithium-Ion Battery Pack
Price: $359.00Pros:- Can be detached for easy charging
- Integrated charge indicator
- Covered by an 18-month warranty
Cons:- Specifically designed for ecotric bikes
- Only one replacement option
- Replacement batteries might not be available for other bike models
Double your riding time on your favorite ecotric foldable ebike, such as the Starfish or Dolphin, with the ecotric lithium-ion battery pack. Don’t worry if you have a different ecotric bike, though, as you can find an ebike battery for your ride.
This particular lithium-ion battery pack boasts a 36V rated voltage, 450 watt-hours and a 12.5Ah battery capacity. In other words, it’s powerful enough to conquer hills and power along flats. Each battery weighs just 7.69 pounds and lasts over 600 charges per cycle.
Security is just as important as function. This battery is detachable for easy charging and theft protection. You’ll receive two keys for added convenience.
When it’s time to swap out the battery, this lithium-ion pack securely mounts to the base and doesn’t require any wires to hold it in place. An 18-month warranty offers extra peace of mind.
Need a replacement battery for a different Ecotric bike? Browse the full selection for more options.
Find more Ecotric 36V 12.5 Ah (450 Wh) Lithium-Ion Battery Pack information and reviews here.
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10. Joyisi Lithium-ion Ebike Battery Pack
Pros:- Compatible with several different brands
- Hard plastic shells for maximum protection
- Offers an extra range of 20 to 30 miles
Cons:- Flap cover can be tough to open
- Not fully waterproof
- Can be tricky to mount
Cruise for hours with the Joyisi e-bike battery, which comes in 48V and 52V configurations. It’s ideal for bikes with larger, more powerful motors. Although it’s compatible with many brands, you can check with your bike manufacturer to see if it’s a good fit.
The 48V 12.5Ah electric battery is suitable for motors between 500 and 1,000 watts. It’ll provide roughly 30 additional miles.
Larger motors might require the 52V 14Ah Samsung Cell battery, which powers motors ranging from 500 to 1,500 watts. It delivers an extra 20 to 30 miles of riding time.
On the outside, hard plastic shells guard against dust and other environmental hazards. Integrated LED indicators show the remaining battery life. There’s also a built-in USB charger for your phone and other devices.
Anderson connectors are included with each battery. You’ll also find two keys to secure the battery when you’re not riding.
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11. H HAILONG Ebike Battery
Pros:- Constructed with waterproof PVC material
- High energy density for stable performance
- Relatively lightweight given its size
Cons:- Boxy design
- Can take awhile to fully charge
- Not very aerodynamic
One of the best features of this battery is its affordable price tag. It comes in 36V and 48V variations and can fit everything from e-bikes to electric tricycles, scooters and more. Power output ranges from 200W to 1,000W to cover most needs, whether you’re a daily commuter or want a bike for extended off-road adventures.
At the heart of every battery is a premium battery chip for extended performance. Each cell can also be charged over 500 times without compromising the battery’s performance. Even better – you don’t have to drain the battery of its charge before re-charging to extend its life. Every battery delivers over 1,000 charging cycles, or over 5 years of service life.
Bike batteries can be burdensome to carry, especially when they’re heavy and bulky. This one is relatively lightweight, which makes it especially appealing as a backup option. The lowest capacity battery (36V 8AH) weighs just under 4 pounds while the largest 48V 20AH battery weighs 8.37 pounds.
This boxy battery isn’t the most aerodynamic, which could make it a tougher fit on some ebike frames. However, it has a wider range of applications than most other batteries on this list, which are strictly for electric bikes.
How Do I Know Which Battery to Get for My Electric Bike?
Whether you're buying a backup battery or want to upgrade, you need to get a battery that's compatible with your ride. You'll need to stay within the recommended range to avoid potential issues.
Most manufacturers sell lithium-ion batteries, which are popular due to their affordability and low maintenance over time.
According to the University of Washington's Clean Energy Institute, lithium-ion batteries have a low self-discharge range of 1.5 to 2 percent per month. This low rate means a longer shelf life. They're also relatively easy to dispose of as they don't contain cadmium.
As you shop for the best battery for your electric bicycle, you'll notice several numbers. Some of the most important include watt-hours (Wh), amp-hours (Ah) and volts. Many manufacturers also list the amps, although this isn't the same as amp-hours.
Watt-hours combine voltage and amp-hours to determine how far you can ride on a single charge. Amp-hour ratings suggest a perceived capacity, or how long the battery can operate over a specific amount of time.
Which Battery Is Best for an eBike?
Every battery comes with its own set of numbers to give you a better idea of how much power, performance and run time you can expect on your rides.
However, these numbers aren't concrete. Just because a manufacturer suggests a certain range, it doesn't necessarily mean you should expect those same numbers.
Every bike and rider is different. Realistically, numbers will vary from one rider to the next. Factors such as terrain, bike and rider weight, and even weather conditions can influence how long your battery lasts with each ride. A fat tire electric bicycle, for example, will likely require a larger battery than a more compact step-thru e-bike for commuters.
What Is the Lifespan of an Ebike Battery?
According to BatteryUniversity, the capacity of a lithium-ion battery may deteriorate after just one year. This type of battery might completely fail in just two or three years. However, some lithium-ion packs can last as long as five years.
Some manufacturers include an expected charge cycle for their batteries. For example, you might notice your battery of choice is rated for 500 or 600 cycles. This number will give you a rough idea of how long your battery might last under normal circumstances.
How Much Does an Ebike Battery Cost?
Most replacement batteries cost between $200 to $500. Larger batteries with a higher capacity typically sit at the higher end of the price range.
For example, a 36V 10Ah battery may cost $200 and a 48V 11.6AH can cost over $400. Regardless of the price, you'll want to make sure that the battery is compatible with your bike.
What Size Is Best for an Ebike Battery?
Just as every bike and rider is unique, so is an e-bike battery. The best size e-bike battery for your ride depends on many factors, including the size and weight of the bike and your typical riding routes.
A smaller battery is faster, efficient and slightly cheaper. But it might not offer the power and performance you actually need for more demanding tasks, such as off-road rides on your electric mountain bike.
Take an entry-level battery, such as a 36V 10Ah battery, and compare it to a beefier 48V 15Ah battery. The 36V battery weighs less but doesn't have the larger amount of power or riding range as the 48V battery.
While the 36V battery is more practical and economical on lighter folding ebikes, the 48V battery offers more bang for your buck if you're a larger rider or have a heavier electric bike. This is especially true if you frequently ride up long, steep hills, or transport cargo on your electric beach cruiser bike.