Triangle Ebike Battery 48V 45Ah — 2160Wh Maximum-Range Cargo & Touring Battery

The Largest Capacity in the 48V Triangle Range

Most riders converting a bicycle to electric never need more than a 20Ah or 30Ah battery. This one is for the riders who do. At 45Ah and 48V nominal, this battery stores 2160Wh of usable energy — the largest capacity available in the entire 48V triangle format, well ahead of the 1680Wh 35Ah pack and nearly 50% more than the 1440Wh 30Ah pack that most builders treat as the “big” option. This is the battery for cargo bike conversions carrying heavy loads, delivery riders covering long routes without a midday charge stop, and multi-day touring builds where the next charging opportunity might be a full day away.

The maths is straightforward: a 48V motor system drawing 15–20Wh per kilometre under mixed riding conditions gets an estimated 108–144km of range from this battery on a single charge — territory that very few converted bicycles ever reach. Under heavier load, carrying cargo, or riding into headwinds, that range drops, but it drops from a much higher baseline than any other 48V triangle pack offers. This is capacity built specifically as a buffer against the conditions that drain smaller batteries fastest.

Grade A 21700 Cells — Capacity That Doesn’t Compromise on Quality

Reaching 45Ah in a triangle-format pack means packing a high cell count into a fixed physical footprint, and cell quality matters more at this scale, not less. This battery uses Grade A 21700 lithium-ion cells, selected specifically for consistent capacity and matched internal resistance across the full series string. At higher cell counts, even small inconsistencies between individual cells compound — a handful of weaker cells in a 45Ah pack can quietly drag down real-world range and accelerate uneven ageing across the whole battery. Grade A selection at the manufacturing stage is what prevents that, ensuring every cell in this pack performs and ages in step with its neighbours throughout the 800–1000+ cycle rated life.

The 21700 cell format itself is the right choice for a capacity-first battery like this one: higher energy density per cell than the older 18650 standard, which is what makes a 45Ah pack physically achievable inside a standard bicycle frame triangle in the first place, rather than requiring an external rack-mounted enclosure.

40A Continuous Discharge — Matched to Sustained, Steady-State Riding

This battery is specified with a 40A continuous discharge rating, delivering up to 1920W of sustained power at 48V nominal. That’s a deliberate choice rather than a limitation: a 45Ah battery is built for long, steady riding — full-day touring stages, loaded cargo runs, repeated delivery loops — rather than short bursts of maximum motor output. The 40A rating comfortably covers the full operating range of 48V hub motor and Bafang mid-drive systems up to 1000W under sustained load, which is exactly the kind of riding this battery’s capacity is designed around.

For builds that combine this kind of long-range requirement with a higher-output 2000W motor system, the E-Bike Conversion Kit 2000W BLACK is worth checking against your specific load and terrain profile — message us with the details of your build and we’ll confirm whether the 40A discharge rating gives you the headroom you need, or whether a higher-discharge pack is the better match.

54.6V Cut-Off — A Longer Charge Cycle for a Larger Pack

This battery charges to a full cut-off voltage of 54.6V, in line with every other pack in the 48V range, but the charge time itself stretches to approximately 9 hours from empty given the substantially larger 45Ah capacity. For most owners this fits naturally into an overnight charging routine — plug in after the day’s riding is done, wake up to a full 2160Wh the next morning. For delivery and fleet applications running back-to-back shifts, the longer charge time is worth planning around: this is a battery built for one long charge covering one long day, not for quick top-ups between short runs.

The BMS terminates charging automatically at 54.6V regardless of charger output, so there’s no risk of overcharge even across a longer charging session.

BMS — Four-Layer Protection Scaled for a Larger Cell Count

Active cell balancing during charging is especially important at this capacity — with a higher total cell count than the 30Ah or 35Ah packs, keeping every cell in step is what prevents the slow capacity drift that would otherwise show up first as reduced range, then as a shortened usable life. The BMS manages this automatically on every cycle, with no input needed from the rider.

Triangle Format at Maximum Capacity — Fit Is Not Optional

Frame triangle mounting still delivers the same fundamental advantages at 45Ah that it does at smaller capacities — weight centred between the wheels and low in the frame, rather than cantilevered off a rear rack where a battery this size would noticeably affect handling and braking balance. But at this capacity, the triangle pack itself is physically larger than anything else in the 48V range, and frame compatibility becomes the deciding factor rather than a formality.

The durable, heat-resistant outer casing and integrated mounting straps are the same proven design used across the range, sized up to suit the larger cell assembly inside — no drilling, no welding, no permanent frame modification required for installation.

Who This Battery Is Actually For

Most converted bicycles never need 2160Wh of onboard energy. This battery exists for the builds that genuinely do: cargo bike conversions hauling regular heavy loads where range drops fastest, delivery riders covering long routes across a full working shift, multi-day touring setups where the next reliable charging point is a day’s ride away, and any 48V build where the cost of running out of charge mid-route is higher than the cost of carrying a larger battery. If your typical ride is a daily commute under 30km, the 20Ah or 30Ah pack in this range will serve you better and cost less. If your riding regularly pushes past where smaller batteries run dry, this is the pack built for that exact problem.

For the complete battery range across triangle and downtube formats at every voltage and capacity, visit the Batteries category page. For compatible motor systems, visit the Conversion Kit category page.

Warranty and Returns

Every Triangle Ebike Battery 48V 45Ah purchased from All4eBikes is covered by a 12-month warranty against manufacturing defects, alongside a 30-day return window for complete purchase confidence.