Ultra Motor A2B Battery
A2B use a state of the art high-capacity Sanyo lithium ion battery for their electric bikes. It has the best energy to weight ratio and loses charge slowly. The Ultra Motor A2B Battery fully recharges in about 3-4 hours and plugs into any mains socket.
The primary battery is integrated into the downtime. A second Ultra motor A2B battery can be added to the bike and is mounted to the rear rack, doubling the traveling distance.