JTX B9 5-9V Battery Charging Activation Board for iPhone 6S-17 Pro Max (without 16e) & Android 1. JTX B9 battery activation test board compatible with iPhone 6S to 17 Pro Max and Android 400+ models 2. Intelligent RecognitionOverload ProtectionAuto Power Off 3. One-Click Battery Activation: Snap on the battery connector. With a simple press of a button, quickly activate it to give your battery a new lease on life 4. Plug and Play Battery Charging: Snap on the battery connector-no complicated steps required. Just a quick snap for fast charging, giving your battery a new lease on life 5. ChargingOutput Multi-Interface: Features both Type-C and USB interfaces, with voltage-regulated output for flexible use 6. Real-time Monitoring Digital Display of CurrentVoltage: When the device is not powered, it displays the battery's voltage and current 7. When the device is powered, it displays the real-time voltage and current of B9 charging the battery 8. Full of automatic power-off: The battery will automatically shut off when fully charged, and the blue indicator light will turn off 9. High-voltage battery: Activate charging 5-9V adaptive voltage 10. Smart Polarity Detection: Intelligent automatic polarity detection, effortless and time-saving