Original price was: £659.90.£499.90Current price is: £499.90.
Triangle Ebike Battery 72V 27Ah – High-capacity lithium-ion battery with an 80A BMS, built to power motors up to 5000W.
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The Triangle Ebike Battery 72V 27Ah is the high-discharge, high-capacity flagship of the 72V triangle battery range — a frame-integrated lithium-ion 72V battery pack built on Grade A 21700 EVE4500mAh cells, delivering 1944Wh at 72V nominal with an 80A continuous discharge current and XT90 connector. Compatible with motor systems up to 5000W, the Triangle Ebike Battery 72V 27Ah sits at the top of the range in every measurable specification — the highest capacity in the 72V triangle lineup, the highest discharge rating, and the EVE industrial-grade cell chemistry that handles sustained high-current 72V operation without the thermal stress or performance degradation that limits lower-specification cells. This is the 72V triangle ebike battery for extreme performance builds.
The most important specification of the Triangle Ebike Battery 72V 27Ah is its 80A continuous discharge current — the highest discharge rating in the 72V triangle battery range, and the specification that makes this 72V battery the correct energy source for motor systems up to 5000W. At 72V nominal, 80A continuous discharge delivers 5760W of sustained power draw — 760W above the 5000W motor ceiling, providing genuine headroom against BMS protection thresholds under the hardest possible riding conditions including sustained full-throttle climbing under heavy load, aggressive off-road riding, and track or race applications where the motor is pushed to its absolute limits. The 80A BMS rating at 72V is not a marginal specification for 5000W motor systems — it is the correct discharge rating that keeps the BMS operating comfortably within its envelope regardless of how hard the motor is pushed.
For direct comparison with the 60A format, the Triangle Ebike Battery 72V 20Ah 60A delivers 1440Wh at 60A — the 27Ah 80A format adds 504Wh of capacity and 20A more discharge headroom, correctly specified for the step up from 3000W to 5000W motor systems.
At 27Ah and 72V nominal, the Triangle Ebike Battery 72V 27Ah stores 1944Wh of usable energy — the highest capacity in the entire 72V triangle battery range. For high-output 72V motor systems in the 3000W–5000W range consuming 40–60Wh per kilometre under hard riding conditions, 1944Wh delivers an estimated range of 32–48km per charge — meaningful full-session range for performance riding applications. For motor systems operating at lower average power levels — long-distance commuting, touring, or extended trail riding at moderate speeds — the range per charge extends substantially beyond the hard-riding estimate, making this the correct 72V battery pack for any build where both maximum performance and genuine range are design priorities simultaneously.
The Triangle Ebike Battery 72V 27Ah is built on Grade A 21700 EVE4500mAh cells — EVE Energy’s premium 21700 cell specifically selected for its combination of high energy density and high sustained discharge capability. EVE is a leading lithium-ion cell manufacturer with extensive deployment in EV powertrains, grid energy storage, and industrial battery applications where sustained high-current operation is the design requirement rather than an edge case. The EVE 21700 cell format delivers the sustained discharge performance needed for 80A operation at 72V without the cell-level thermal stress that would degrade standard cells under equivalent current demands.
Grade A selection ensures every cell in this 72V triangle ebike battery is manufactured to the tightest internal resistance tolerances — critical at 72V where the longer series string required for the higher nominal voltage amplifies any cell-to-cell inconsistency in resistance or capacity. Consistent cells charge evenly, discharge evenly, age evenly, and enable the BMS to manage the pack optimally across every cycle. The cycle life specification reflects this: 800–1000+ cycles before the pack degrades to 80% of its original 1944Wh capacity — a 72V battery that earns its cost across years of demanding high-voltage use.
The Triangle Ebike Battery 72V 27Ah uses an XT90 connector rated for up to 90A continuous current — the correct connector specification for 80A continuous discharge. At 80A operating current, an XT60 connector would be at its absolute rating limit with no thermal headroom, generating elevated contact resistance and heat under sustained high-current operation. The XT90 connector handles 80A with a 10A margin, maintaining low contact resistance, minimal terminal heat generation, and long-term connector reliability across hundreds of high-current connection cycles. This is correct hardware matching throughout the 72V battery pack — the connector specification is consistent with the BMS discharge rating and the cell chemistry, not a bottleneck in an otherwise high-specification system.
The 72V triangle ebike battery charges to a full cut-off voltage of 84V — the correct charge termination voltage for a 20-series 72V lithium-ion pack. A 72V-specific charger with 84V output is required — standard 48V or 52V chargers are incompatible and must not be used. The BMS enforces the 84V cut-off automatically, protecting the EVE4500mAh cells from overcharge regardless of charger output within the supported range. A full charge from empty takes approximately 6 hours at standard charge rates — suited to overnight charging routines that deliver the full 1944Wh of capacity for every ride.
The integrated BMS in the Triangle Ebike Battery 72V 27Ah provides four layers of active protection specifically calibrated for 72V operation at 80A. Overcharge protection terminates charging at 84V. Over-discharge protection enforces the low-voltage cut-off to preserve EVE4500mAh cell chemistry at the bottom of the discharge curve. Overcurrent protection limits discharge current under fault conditions beyond the 80A operating rating, protecting both the cell pack and the connected high-power motor controller from fault damage. Short-circuit protection provides immediate shutdown on wiring or connector failure. Active cell balancing during charging ensures every EVE cell in the series string reaches the same state of charge — essential at 72V where the longer series string makes cell balance more critical than at lower voltages. The BMS operates continuously and transparently, requiring no user maintenance.
The Triangle Ebike Battery 72V 27Ah mounts inside the main bicycle frame triangle using integrated straps and brackets — placing 1944Wh of 72V stored energy at the geometric centre of the bicycle between both wheels, as low as the triangle geometry allows. For builds running 5000W motor systems at 72V, frame triangle mounting is not just a preference — it is a handling necessity. The rapid, high-torque acceleration that 5000W at 72V produces creates powerful rearward weight transfer under hard throttle. A battery at the frame centre counteracts this weight transfer more effectively than any other mounting position, keeping the front wheel loaded and the handling stable under the hardest acceleration. The clean, integrated appearance of the triangle battery inside the frame suits the premium specification level of a 72V 5000W build — a high-performance machine should look as capable as it performs.
The durable, heat-resistant casing protects the Grade A EVE cells and 72V/80A BMS from vibration, impact, and weather exposure during normal hard riding. Verify your frame triangle dimensions against this battery’s physical profile before ordering — at 27Ah the 72V 27Ah format is the largest battery in the 72V triangle range and requires the most frame triangle volume. For the full range of high-power conversion kits rated for 72V operation, visit the Conversion Kit category page. For the complete battery range across all voltages and capacities, visit the Batteries category page.
| Spec | Detail |
|---|---|
| Voltage | 72V |
| Capacity | 27Ah |
| Battery Type | Lithium-ion (Li-ion) |
| Energy | ~1944Wh |
| Cell Type | Grade A 21700 EVE4500mAh |
| Discharge Current | 80A continuous |
| Charging Voltage | 84V |
| Cycle Life | 800–1000+ cycles |
| BMS Protection | Overcharge, over-discharge, overcurrent, short-circuit |
| Charging Time | ~6 hours |
| Connector | XT90 |
| Case Material | Durable, heat-resistant |
| Compatible Motor Power | Up to 5000W (72V) |
| Format | Triangle (frame-integrated) |
The Triangle Ebike Battery 72V 27Ah is the maximum-specification 72V triangle battery — 1944Wh of EVE4500mAh energy, 80A continuous discharge, XT90 high-current connector, 84V charge termination, 800–1000+ cycle longevity, and four-layer BMS protection calibrated for 72V high-power operation up to 5000W. The 72V triangle ebike battery, 72V battery, triangle battery, and 72V battery pack that defines the ceiling of the range — the correct energy source for the highest-specification 72V builds.
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