Xiaomi 30W wireless charging bank is equipped with USB-A, Type-C two output interfaces, the use of Type-C interface output alone, can provide a maximum of 30W power flash charge, but also support two-way fast charge, the maximum input power can reach 18W, 4 hours can be fully full of charging bank. Xiaomi Wireless Charging Bank 30W 10000mAh Model :WPB25ZM Battery Type: lithium-ion polymer battery.