【USB Charge Design】No need charger and adapter,fast full charge in about 2 hours,easy to charge with usb cable, just simply plug into USB ports
【4 Pack Rechargeable AA Batteries】Rechargeable usb aa battery with 1200+ cycles , save your big money comparing with the single use batteries
【Led Indicators Management】During charging, the green LED light will flash, and after full charge, the LED light will remain on
【Multi-Safe Protection】Built-in Integrated safety circuit protects Battery from over discharge/overcharge,when the battery is fully charged, it will automatically stop charging,passed the test of CE, ROSH, 2006/66/EC
【ENERGY SAVING】Mercury, cadmium and lead are not used in these lithium aa rechargeable batteries, saving thousands of alkaline batteries and reducing a significant about of landfill waste