View source for Brammo's battery statement

From the [http://www.brammo.com/enertia/#specifications Brammo website]:

The batteries we use in the Enertia have an amazing life cycle and are maintenance free. They're inherently extremely safe and can withstand temperatures without decomposing and, unlike other batteries, can be topped up at any time.

The Enertia uses six batteries and the on-board computer ensures that they maintain an equal charge. This prevents total battery depletion and maximizes energy storage on the powercycle. For your convenience and ease of charging we have built a charger into the Enertia powercycle. The on-board battery charger can charge using any standard 10 amp 115 volt electrical outlet and the Enertia powercycle is estimated to only need 13 charges per month based on average commuter data.

This means you can charge the Enertia powercycle anytime: at home, work, anywhere there is a socket. You will save time, money on maintenance, and you will never have to worry about forgetting the charger because it's always on board.