Keep tabs on your car battery without ever popping the hood. The Quicklynks BM6 is a compact Bluetooth monitor that syncs with your smartphone to deliver real-time voltage, cranking performance, and charging system health straight to your pocket.

Its IP67 waterproof build shrugs off engine-bay heat and grime, while the free app tracks trip history, flags abnormal data, and even helps you locate your parked car on a map. Whether you run a lead-acid, AGM, or gel battery, this little gadget makes battery anxiety a thing of the past.

• Brand: Quicklynks
• Model Number: BM6
• Product Type: Bluetooth Battery Monitor
• Bluetooth Version: 4.2
• Input Voltage: DC 6V ~ 20V
• Voltage Accuracy (9V~16V): ±0.03V
• Average Working Current: 1.5mA
• Working Temperature: -40°F ~ 194°F
• Reverse Connection Protection: Built in
• Short-circuit Protection: Built in
• Waterproof Rating: IP67
• Dimensions: 2.17" L x 1.61" W x 0.49" H
• Supported Languages: English, Russian, German, Chinese
• Compatible Battery Types: Lead-Acid, AGM, GEL, EPB
• Compatible Vehicles: Motorcycles, Cars, SUVs, MPVs, Light Trucks, Trucks, Boats
• App Compatibility: iOS 4S and later, Android 4.3 and later (Bluetooth 4.0 required)
• Data Storage: Up to 35 days out of sync
• Bluetooth Range: Up to 10 meters