Sigma IION

Small, light with plenty of Li-Ion power

It benefits in particular from its low weight (140 g), its high energy ratio and its resistance to extreme temperatures. Its low self-discharge makes the IION much more efficient than NiMH or lead rechargeable batteries. The rechargeable battery pack can be universally attached to the bike thanks to the familiar Twist Lock bracket, which can be fastened either with Velcro tape or cables ties. Convenient too: the IION can be removed at any time with a single action.
A second bracket is available as an accessory.