[Universal Compatibility] 4x21700 Fast Charge Battery Power Case 22.5W for QC3.0 LCD Display DIY Power Bank Case 15W Wireless Charging Box Detachable Safely supports for PPS/PD3.0/PD2.0/QC4+/QC4/QC3.0/QC2.0 protocols, tailored for various electronic devices. [Power in Your Pocket] This portable charger is lighter and smaller than most power banks, fitting easily in your bag or pocket for charging on the go. Its 20000mAh battery pack keeps your device fully charged all day. [Safety Protection & What will you get] Safety protection designs, comprehensive safety system includes overcharge protection, short circuit protection, temperature control, and more. It is allowed and safe to board with on any plane, so you won't be caught on short of power when you are on the go. [22.5W Fast Input & Portable] The battery pack also supports 22.5W fast input, the fast charge power bank will only take 2 hours to be fully charged using a 22.5W PD adapter (adapter not included), 2-3 times faster than other power bank, to save your precious time. Portable travel battery pack, it portability just like a lighter cell phone, easily take it anywhere on the go. [LCD Digital Display] Monitor your power levels with precision using the LCD digital display, keeping you informed at all times. Model Number:21700 Battery Case Item Type:DIY Box & Shell Batteries Need:4xflat 21700 lithium battery(Not Include) Colour:Black Material:Plastic Package Contents: 1 * power supply case Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.