Compact battery with wireless charging function and magnetic fixation to the back cover 12-15. The device also has a charging function 2-8. The ergonomic shape, proximity sensor for automatic charging start, and efficient cooling system enhance everyday comfort. For smartphones with wireless charging and 8-11, we recommend purchasing a sticker adapter to fully utilize the capabilities of the magnetically attachable battery, including as an ultra-compact desktop charging station. Lithium polymer battery Capacity: 5000 mAh Number of charge-discharge cycles: at least 500 Wireless charging power: 5W for smartphones, up to 3W for Input and output parameters: 5 2.4 Charging time: up to 3 hours from the 5V power supply, 2.1A) Automatic charging activation by proximity sensor Efficient cooling system for the charging coil Convenient flip stand for use as a charging station Includes cable with connector for battery charging Attention! Not all smartphone and watch models support wireless charging function.