To charge the battery, power off your bike, and simply plug in the charging lead into the battery. You should see a red led light up on the charger, signalling that the bike isn’t fully charged.Switch on the electric switch and the batterywill start charging. When the charging is full, the red light will turn green. The battery can be charged while attached to the bike, and for bikes where the battery is removable, the battery can be removed to charge.