1. One click activates battery/charging, supports Android series models 400+. 2. Intelligent recognition/Overload protection/Auto power off 3. 4.2V regulated output/Real-time detection/Fast charging/Automatic Identification/One-click charging in low battery 4. Instant use battery charging: Snap on the battery connector, no need for complicated operation, just a gentle click, fast charging, rejuvenate your batteries 5. Energize the Battery Checker Board: Can be powered by Type-C or alligator clips; power on (USB only for output) 6. Snap on the battery connector: For Android series, just follow the labeled models, find the corresponding battery holder and snap it on 7. Automatic power-off when fully charged: When the battery is full, it will automatically power off; the blue indicator light goes out 8. Charging/Output multiple ports, voltage regulator output, with Type-C/USB two ports, use according to the demand