Bluetooth battery monitoring, lead-acid / lithium, 6...19 VDC, self consumption 0.53 mA without BT / 1.7 mA with BT, reverse polarity protection, IP67, App Store (iOs10.0) or Google Play (Android 4.3), APP: intAct Battery-Check, M8
With the intAct Battery-Guard you can easily monitor and log the state of charge of your battery via APP.