For 2020 we have two new high-power batteries available, 30Wh and 60Wh, now with more durable composite casings, USB-C two way charging and built in battery indicators. These are the same batteries found powering Tesla cars! Their use extends far beyond use with headlamps, they can be used as battery backups for any USB power device with our range of adapter cables and can be easily charged in your vehicle. The new batteries are backward-compatible with previous Gemini lights.