This APP is for Sunlux Powerbox only LiFePO4 battery with BLE (Bluetooth low energy) connection. * The best way to monitor yours lithium battery! * Install the latest APP version to Sunlux Powerbox. * Some mobiles / tablets that lack hardware support for BLE (Bluetooth low energy) cannot connect to the device. * Measurement range <= 5m * Only one mobile / tablet device at a time can connects to the battery. * If you want to connect the battery to another android device you first need