The LED energy requirements, flowing light charging indicator Polymer lithium battery, eco-friendly, safe, non-toxic Item specificsis_customized:YesCompatible Brand: ... in time 6. Polymer lithium battery, eco-friendly, safe, non-toxic 7. Fashionable, delicate, lightweight, easy-to-carry for travel Specifications: 1. ... : up to 13 hours 11.weight with package:100g new arrival nice2200mAh backup battery