Specifications Battery Compatibility Single flat head 21700 battery or 18650 battery battery not included Material Aluminum alloyOutput 5V 2 1APower 10WCharging Port Type C interfaceFeatures 1 No Soldering Assembly Type C interface ensures easy and straightforward installation without the need for soldering perfect for DIY enthusiasts 2 Wide Battery Compatibility Supports both single 18650 or 21700 batteries offering flexibility for different battery types 3 Fast Charging Capability Delivers stable 5V 2 1A quick charging performance for time efficient charging 4 Compact and Portable Design Lightweight and space saving aluminum alloy sleeve ideal for creating mini DIY power banks 5 Enhanced Safety Features Built in protections against overcharging over discharging and short circuits ensure safe usage Package Included 1 x No Soldering DIY Power Bank Kit Battery NOT included