This one is better: http://www.thrunite.com/thrunite-c2-3400-mah-compact-portable-charger/ http://www.thrunite.com/thrunite-c2-3400-mah-compact-portabl... I as

This one is better: http://www.thrunite.com/thrunite-c2-3400-mah-compact-portable-charger/ http://www.thrunite.com/thrunite-c2-3400-mah-compact-portabl... I asked for old laptop batteries from my relatives/friends, so I have currently around 30 of them. I also use it a lot for my bike light and hiking light. I bought the latest version of the C2 and it charges perfectly.