Skip to product information
1 of 3


Replacement Battery for ECOTRIC Hammer FAT20850C Upgraded 15Ah 48V Fat Tire Ebike

Replacement Battery for ECOTRIC Hammer FAT20850C Upgraded 15Ah 48V Fat Tire Ebike


Regular price $399.00 USD
Regular price $449.00 USD Sale price $399.00 USD
Sale Sold out
Shipping calculated at checkout.


Condition: Brand new

Packge include: Battery+keys

Item size: 430*110*75mm

Discharging position: Bottom-2 ports output

Energy: 720Wh

Voltage: 48V

Case Material: Aluminium alloy+ flame retardant plastic

Battery type: Lithium lon

Model: Seat tube battery

Weight: 4.1kg

Working temperature for charge: 0℃-45℃

Recommended to use: 48V 500W 750W 1000W Motor

Working temperature for discharge: -20℃-55℃

Cells: Grade A high power cells

Battery Capacity: 15Ah






The battery also has an 18-month warranty. You can view our return policy for details.

For assistance in choosing the right battery for your Ecotric e-bike, please contact us via email(

Please note that we have two kinds of this battery now if you need to buy a new battery for Vortex, please choose the right photo to buy it, if you have any questions, please send it to

View full details

Customer Reviews

Based on 5 reviews
jeffrey allison (St Louis, US)

I am pleased with rhe new battery. I received it very quickly. The only other comment is that the power indicator on the battery doesn't work, it reads fine on the screen so its no big deal.

Tim Mueller (Medford, US)
Replacement 15ah upgrade battery

Our 2 year old battery didn't go bad, it fell out of our RV onto concrete and broke. The upgrade battery will be great for us as we have 2 Hammers and I weigh 80 pounds more than my wife. So the extra battery life will be great. While the battery is a direct fit, I had to adjust the slide and grind a little bit from the top. We already noticed that the slides were adjusted for each battery as our old batteries were not interchangeable. No big deal. Love our Hammer bikes!!

Michael Gray (Peabody, US)
Replacement battery

It does not carry a charge I would like the new one or my money back I can send back the old one if you give me instructions

Vince Watson (Glenpool, US)
very helpful...

I needed a controller and a battery for my Fat Tire Hammer electric bike. The controller was out of stock but they put me on a list and emailed me when it was available.

Mike Mauney (St. Petersburg, US)

I ride everyday to work charge 1 time a week got 2000 mi on it great bike