To charge the battery, simply plug it into a regular wall outlet, either attached to or off of the bike. You never need to wait for the battery to fully discharge. However, a full charge only takes four hours, so you can easily let it power back up during the workday or between errands.
Type: Lithium-Ion battery charger
Input: 100-240VAC / 50/60Hz / 140W
Output: 36V / 2A