Ebike Battery 48V 20Ah — 960Wh Grade A 21700 Cell Battery Pack

Grade A 21700 Cells — Premium Energy Density

The cell specification inside this battery is the most important differentiator between this pack and the compact-format 48V batteries in the range. Built on Grade A 21700 4800mAh cells, this pack uses the larger 21700 cylindrical cell format rather than the standard 18650. The 21700 cell delivers significantly higher energy density per unit — more capacity per cell volume, which translates directly into a higher overall pack capacity within a manageable physical footprint.

At 21700 Grade A specification, every cell is manufactured to the tightest internal resistance tolerances, ensuring balanced charge distribution across the entire series string, consistent output under load, and uniform ageing across all cells over the pack’s service life. The cycle life specification reflects this quality — ≥80% capacity retention after 800 full charge cycles. Under daily use with one full charge cycle per day, that represents over two years before the pack drops below 80% of its original 960Wh capacity.

960Wh — High Capacity, Dual Voltage Compatibility

At 20Ah and 48V nominal, this battery stores 960Wh of usable energy — enough for an estimated 48–64km range from a 250W–350W mid drive system under mixed conditions. Higher-output motor systems in the 750W–1500W range draw more energy per kilometre but still deliver meaningful real-world range that covers commuting and recreational riding distances comfortably on a single charge.

The dual compatibility with both 48V and 52V motor systems is a key specification advantage — this battery is rated for motors up to 1500W across both voltage platforms, giving it broader motor compatibility than the compact-format 48V packs rated to 1000W. Running this battery with a 52V-compatible motor system uses the full voltage available from the 54.6V charge cut-off, sharpening acceleration and increasing peak power at the top of the charge curve.

40A Continuous, 100A Peak — Built for 1500W Motor Systems

The discharge specification of this battery is what makes it the correct energy source for high-output 48V motor systems up to 1500W. At 40A continuous discharge current, the pack sustains up to 1920W of continuous power draw at 48V nominal — well above the 1500W maximum motor rating, providing substantial headroom against BMS protection thresholds under sustained hard riding conditions including steep climbs, heavy loads and high-speed flat riding. The 100A peak discharge current handles the high-amplitude current spikes during hard acceleration from a standstill without voltage sag or protective shutdown — a specification that lower-quality 48V packs with 30A BMS ratings simply cannot match.

Voltage Window — 54.6V Full Charge to 37.4V Cut-Off

This battery operates between a full charge voltage of 54.6V and a discharge cut-off of 37.4V. At full charge the pack delivers its peak voltage — producing maximum motor performance and sharpest throttle response. As the pack discharges through its operating range, voltage declines gradually within the 17.2V window between these two points, delivering the full 960Wh of energy across a range that any standard 48V motor controller manages natively. The BMS enforces both limits automatically — no user intervention required, no risk of overcharge or over-discharge damage under normal use.

Compact Downtube Format — 368 × 123mm

This battery is built in a standard downtube format measuring 368 × 123mm and weighing approximately 6.2kg. The downtube mounting position places this weight at the lowest, most central point of the bicycle frame — optimising weight distribution for balanced handling and a low centre of gravity that keeps the converted bicycle riding naturally. At 6.2kg, the pack is heavier than the compact 13Ah and 15Ah formats — a direct consequence of the higher cell count needed for 960Wh capacity in 21700 format.

For builds where the Hailong case format is preferred with identical capacity, the Ebike Battery 48V 20Ah Hailong is the direct alternative with the same 20Ah capacity in Hailong-specific case geometry. For the complete battery range across all voltages and capacities, visit the Batteries category page.

Charging — 3A Standard, 5A Fast

This battery charges at a standard rate of 3A, delivering a full charge from empty in approximately 6–7 hours — ideal for overnight charging routines. For faster turnaround, the pack supports a maximum continuous charge current of 5A, reducing full charge time to approximately 4 hours. The BMS terminates charging automatically at the 54.6V cut-off regardless of charger output, ensuring no risk of overcharge at either supported charge rate. Consistent overnight charging at 3A is the usage pattern that helps this pack achieve and maintain its 800-cycle longevity specification.

BMS Protection — Active Management on Every Cycle

The integrated BMS provides active protection against every common lithium battery failure mode:

Cell balancing during charging ensures every cell in the series string reaches the same state of charge — the active management mechanism that maintains capacity consistency across 800 cycles and prevents early-ageing divergence between individual cells. This battery does not require user maintenance of any kind — the BMS handles all cell management automatically.

Warranty and Returns

Every Ebike Battery 48V 20Ah purchased from All4eBikes is covered by a 12-month warranty against manufacturing defects, alongside a 30-day return window for complete purchase confidence.