Following the big push from Petzl last year to retrofit all of their TIKKA and ZIPKA line of headlamps with the Core rechargeable battery, many headlamps makers from large to small are jumping on the rechargeable bandwagon. Black Diamond recently announced the launch of their first rechargeable headlamp, the ReVolt, while a Kickstarter campaign recently funded a brand new headlamp company trying to design their own rechargeable headlamp from scratch.