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E-Bike Batteries UK

Electric Bike Batteries for Conversion Kits

Shop e-bike batteries in the UK for compatible electric bicycles, hub motors and mid-drive conversion systems. Compare 36V, 48V, 52V and 72V options in down-tube, rear-rack and triangle formats, with capacities suited to different motor, controller and frame requirements.

An electric bike battery must match the system voltage, controller current demand, connector polarity, charger and physical mounting space. A similar case or plug does not prove compatibility.

How to choose an electric bicycle battery

Match the voltage: use only a battery voltage supported by the motor, controller, display and wiring.
Check capacity: amp-hours and watt-hours help compare stored energy, but real range also depends on terrain, rider load, assistance level, temperature and tyre pressure.
Confirm discharge capability: the battery-management system must support the controller's current requirement.
Measure the mounting area: allow room for the case, rail, key, connectors and removal path.
Use the correct charger: do not mix chargers between batteries unless the specifications and connector are confirmed compatible.

Battery and conversion-kit guides

Check the individual product specification before ordering. If voltage, connector, polarity, discharge capability or mounting fit is uncertain, ask the component supplier or a qualified e-bike technician to confirm it.

Frequently asked questions

Can I replace a 36V e-bike battery with a 48V battery?

Only if the motor, controller, display, wiring and other components are designed for 48V. Do not treat a higher-voltage battery as a simple capacity upgrade.

Does a higher Ah battery give more range?

At the same voltage, a higher amp-hour rating usually stores more energy, but range still varies with terrain, assistance level, rider weight, weather and system efficiency.