COMPATIBILITY: 100% compatible with Sony NP-FZ100 Li-on Battery. Compatible with Sony ZV-E1, FX3, FX30, A1, A9, A9 II, A7R III, A7R IV, A7R V, A7S III, A7 III, A7 IV, A6600, A7C Cameras; It can charge 2 packs NP-FZ100 batteries at same time, also can charge 1 battery; Note: Battery is not included BACKUP BATTERY: Give you a complete backup solution; Only a few hours to simultaneously recharge both batteries with the micro-USB 5V/2.1A input; Output: 8.4V/730mA; Note:Charging efficiency is determined by input current and voltage MULTIPLE CHARGING OPTION: Charge with a USB wall charger, cellphone charger, car charger, laptop or power bank gives you more options than a standard battery charger; Recharge inside the camera or with a 2.1A input charger for optimal charging LIGHT WEIGHT: Only 23mm thin; LED display screen can clearly show the charging and power status; Space-saving and convient to your trip, business and all the outdoor exercise SAFE INTELLIGENT PROTECTION SYSTEM: Quick charge with multiple circuit protection to prevent battery from overcharging, high temperature, over current protection, over voltage protection, short circuit protection