Running out of juice 5 miles from the truck turns a great hunt into a long walk. The Bakcou 25Ah extended-range battery packs 1,200 watt-hours of Panasonic lithium-ion cells into a drop-in replacement that doubles your range on any Bakcou fat tire e-bike — no wiring changes, no modifications.


Key Features
- 25Ah / 1,200Wh capacity — the largest fat tire e-bike battery on the market
- 48V Panasonic lithium-ion cells rated for 900+ charge cycles
- 6-pin connector — direct drop-in for Bakcou fat tire models
- Compatible with Storm G2, Scout, Mule SD, Mule Jäger, Flatlander SD, and Kodiak SD
- Does NOT fit Step-Through (ST) frames — top tube clearance required
Specifications
| Material | Panasonic lithium-ion cells |
|---|---|
| Capacity | 25Ah / 1,200Wh |
| Voltage | 48V |
| Cell Type | Panasonic lithium-ion |
| Connector | 6-pin drop-in |
| Charge Cycles | 900+ |
Frequently Asked Questions
Which Bakcou bikes does the 25Ah battery fit?
This battery fits all Bakcou fat tire e-bikes with 6-pin connectors: Storm G2, Scout, Mule SD, Mule Jäger, Flatlander SD, and Kodiak SD. It does NOT fit Step-Through (ST) frames.
How much extra range does the 25Ah battery add?
At 1,200 watt-hours, this is roughly double the stock battery capacity. Actual range depends on rider weight, terrain, pedal assist level, and temperature — but expect significantly longer rides before needing a recharge.
How long does the 25Ah battery last?
Bakcou rates it at 900+ charge cycles. At one full charge per week, that is over 17 years of riding before the cells degrade below 80% capacity.
Does this fit the Puma X22 or Bakcou scooters?
No. The 25Ah battery is designed for Bakcou fat tire e-bikes only. The Puma X22 SD and Bakcou scooters use different battery systems.