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4,000 mAh plastic wireless rechargeable battery with high quality lithium polymer battery. It has a built-in 5W wireless charger for wireless charging of your mobile phone. Compatible with all QI-enabled devices such as the latest generation Android, iPhone 8 and later. USB output: 5V / 2.1A. Input: 5V / 1.5A. Wireless output: 5V / 1A 5W. Including micro USB cable.