Sold by CTEK, the Battery Sense Bluetooth Device makes it possible to show you the state of charge of all your batteries in real-time. It provides valuable knowledge about your batteries in a simple, user-friendly, and transparent way. Knowledge of your batteriesÆ charge level makes it easy to monitor each batteries' health status and thus maximize your battery performance and service life. This knowledge will allow you to avoid costly battery replacements and annoying vehicle breakdowns. Connect Battery Sense to the battery and download the app. Your batteries will now start talking to you via your smartphone. With Battery Sense connected, you donÆt have to worry about when to charge. Just walk to your car or vehicle and Battery Sense will communicate with you via your Bluetooth-enabled device, you donÆt even have to start the engine. Battery Sense will show you all your batteries' state of charge. The app will warn you when a battery requires charging well in advance of it reaching zero charge. Battery Sense comes with a two-year warranty and is designed to fit MULTI US 3300, MULTI US 7002, US 0.8, MUS 4.3, MXS 5.0, CT5 Powersport, Murs 7.0 MUS 4.3 Polar, MUS 4.3 Test & Charge, and CT5 Time to Go battery chargers.