Feature: Normal Version Maximum Power: 5V-2.1A Quick Charge Version Maximum Power: 5V-3A 9V-2A 12V-1.5A Quick Charge + Wireless Charge Version Maximum Power: 5V-3A 9V-2A 12V-1.5A 3.4V-5.5V-5A, Wireless Charging :5W/7.5W/10w/15W Charging power depends on your device, for example: 9V-2A, if your device supports 9V-2A, then it will automatically jump to 9V-2A, if not, it will not jump. Battery not included !!! only DIY battery box !!! The PD version needs to be activated (after the battery is installed, the battery level is displayed as zero) The activation step is as follows: After installing the battery, insert the data cable to link the battery box to activate. After activation, the battery power is normal. Specification 1. Function: digital display with power, detachable, welding-free, with anti-reverse connection protection, can charge 21 18650 flat- batteries, when the built-in battery can be used as a power bank, the normal version requires a charging cable.(battery not included) 2. Hand-made DIY mobile power kit, self-configured mobile power, larger battery capacity and more , can better solve your charging problem. 3. Suitable for people with greater charging needs, equipped with 3 charging interface types, for ,for Type-C can charge the charging box. 4. With power display, let you know the remaining power anytime and anywhere, and better charge your mobile phone or other devices. Size:187x82x64mm Material: plastic colour: black Package Contents: 1 * 18650 battery mobile power 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.