{"product_id":"kdator-bm2-bluetooth-12v-battery-monitor-low-volt-alarm-real-time-voltage-app-logs","title":"KDator BM2 Bluetooth 12V Battery Monitor — Low-Volt Alarm, Real-Time Voltage \u0026 App Logs","description":"\u003cp\u003e\u003cstrong\u003eThe KDator BM2 is a Bluetooth-enabled 12V battery monitor that reads voltage, charge state and starting performance, plus issues a low-voltage alarm to protect lead-acid systems.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe BM2 plugs into any 12-volt lead-acid vehicle or solar battery and streams live battery data to a free iPhone or Android app using Bluetooth 4.0. Designed for cars, trucks, motorcycles, boats, RVs and small solar setups, it automatically detects engine starts, tracks driving sessions, and alerts you when voltage falls below safe thresholds so you can address weak batteries before they leave you stranded.\u003c\/p\u003e\n\n\u003ch3\u003eHow will BM2 tell me if a battery is failing?\u003c\/h3\u003e\n\u003cp\u003eThe device continuously monitors voltage and uses built-in logic to estimate charge condition and cranking performance. When measurements drop below set limits the BM2 triggers a LowVolt alarm inside the app, so you get an immediate notification as soon as the unit reconnects.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eReal-time voltage reporting (9–16V range)\u003c\/li\u003e\n\u003cli\u003eAutomatic engine-start detection and cranking power readout\u003c\/li\u003e\n\u003cli\u003eLow-voltage alarm alerts via Bluetooth when you come within ~10 meters\u003c\/li\u003e\n\u003cli\u003eHistorical logs of voltage and driving sessions for trend analysis\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich vehicles and systems are compatible with the BM2?\u003c\/h3\u003e\n\u003cp\u003eThe BM2 works with all standard 12-volt lead-acid battery systems — that includes flooded, AGM and gel batteries commonly used in vehicles and small off-grid setups. It is suitable for passenger cars, light trucks, motorcycles, boats, RVs and solar power installations that operate on a 12V architecture.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCompatible voltage window: 9–16V\u003c\/li\u003e\n\u003cli\u003eSupports automobiles, motorcycles, marine craft, RVs and 12V solar systems\u003c\/li\u003e\n\u003cli\u003eRequires a 12V lead-acid chemistry (not intended for high-voltage lithium packs)\u003c\/li\u003e\n\u003cli\u003ePairs to devices running iOS 7.1+\/Android 4.3+ via Bluetooth 4.0\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat features does the app provide and how easy is setup?\u003c\/h3\u003e\n\u003cp\u003eKDator supplies a free BM2 app for iPhone and Android that connects without entry of pairing codes. Once the BM2 is physically attached to the battery and Bluetooth is enabled on your phone, open the app to see voltage, charge level, cranking detection and session logs instantly.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFree app for iOS and Android — scan the QR in the manual to download\u003c\/li\u003e\n\u003cli\u003eNo pairing code required; automatic discovery via Bluetooth 4.0\u003c\/li\u003e\n\u003cli\u003eView current voltage, charging status and start logs on a single screen\u003c\/li\u003e\n\u003cli\u003eApp stores historical data for trend review and troubleshooting\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does the BM2 protect my vehicle or solar setup day-to-day?\u003c\/h3\u003e\n\u003cp\u003eBy providing continuous voltage monitoring and immediate alerts, the BM2 helps you react to battery drain or charging faults early. The low-voltage alarm and session records make it easier to identify parasitic draws, weak alternators or batteries nearing end of life without guesswork.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLowVolt alarm warns when voltage falls below your preset threshold\u003c\/li\u003e\n\u003cli\u003eStart and charge detection help reveal alternator or starter issues\u003c\/li\u003e\n\u003cli\u003eData logging helps pinpoint intermittent or slow-developing problems\u003c\/li\u003e\n\u003cli\u003eBluetooth range (~10 m) enables hands-free notifications when you return\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The KDator BM2 suits vehicle owners, boaters, RV travelers and small solar system operators who want an affordable, hands-free way to monitor 12V lead-acid batteries and receive low-voltage warnings. It’s ideal for anyone who prefers proactive battery upkeep, trackable charge data, and a simple Bluetooth app rather than bulky testers or manual meter checks. Avoid using BM2 as a replacement for professional diagnostics in complex electrical faults; it’s designed for ongoing monitoring and early warning, not as a full-service repair tool.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does BM2 work with lithium batteries?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. BM2 is designed for 12V lead-acid batteries (flooded, AGM, gel) and is not intended for lithium battery packs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What Bluetooth range triggers the LowVolt alarm?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The BM2 issues a LowVolt alert when your phone enters approximately a 10-meter Bluetooth range of the device.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"KDator","offers":[{"title":"Default Title","offer_id":55167260262743,"sku":"B0CPCG8Z9Q","price":40.67,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/kdator-bm2-front-view.jpg?v=1790380573","url":"https:\/\/britishgarage.co.uk\/products\/kdator-bm2-bluetooth-12v-battery-monitor-low-volt-alarm-real-time-voltage-app-logs","provider":"British Garage","version":"1.0","type":"link"}