GitHub - mspiceland/wireless-battery-monitor: Android Bluetooth wireless battery monitor (prototype)
Bluetooth Battery Monitor FAQ
Amazon.com: QUICKLYNKS BM2 Bluetooth Battery Monitor 12V Car Battery Tester for Lead Acid Battery, LowVolt Alarm for All 12 Volts Solar Power Systems/RVs/Motorcycles/Boats/CarsCompatible with iPhone and Android : Automotive
Bluetooth Battery Monitoring System (Outer Ctn Qty: 12) - Streetwize Accessories