Headphone Adapter Screen Protector charger cable 092714 Pack of 4 3000mAh 18650 Li-ion rechargeable batteries and universal battery charger Only charging for Lithium battery,do not charging for other type of batteries For charger: the charger owns safety protection, providing the constant current and constant voltage safety mode The charger will charge the battery when plug in,and the indicator light display in red,then turn into green after fully charged This charger is for using indoor only,keep it away from moist and heat