The best utility tool provides comprehensive monitoring for ExtraPower LiFePO4 batteries, including: Wirelessly connect to each battery from your phone(tablet). Track cycle life on each battery. Displays S tate of Charge(SOC) percentage with circle graphic. Displays voltage, charging or discharging current , and temperature. Connectivity distance up to 5meters. Uses Bluetooth BLE 4.0 or later. Compatible with Iphones with IOS 7.0 or later. Only one device connects at one time. Some phones(tablets) canot connect with any Bluetooth BLE devices since its hardware does not support Bluetooth BLE, irrelevant to the system version.
