{"product_id":"autel-maxibas-btms-obd2-memory-saver-12v-obd2-battery-backup-with-voltmeter-protection","title":"Autel MaxiBAS BTMS OBD2 Memory Saver — 12V OBD2 Battery Backup with Voltmeter \u0026 Protection","description":"\u003cp\u003e\u003cstrong\u003eThe 2026 Autel MaxiBAS BTMS OBD2 Memory Saver is a compact tool that preserves vehicle electronic memories and settings by powering the ECU during 12V battery removal or replacement.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eWhen you change or disconnect a car battery, modern vehicles can lose stored data such as radio presets, window calibration, throttle adaptation, and fault codes. The Autel MaxiBAS BTMS provides a straightforward OBD2-to-backup-battery connection that keeps the vehicle’s control modules powered so you don’t have to reprogram features or chase intermittent faults later. Built-in protection and a voltmeter make it easy to confirm a safe backup source before you begin work.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the MaxiBAS BTMS prevent lost settings during a battery swap?\u003c\/h3\u003e\n\u003cp\u003eThe MaxiBAS BTMS plugs into the vehicle’s OBD2 port and connects to a separate 12V backup battery via heavy-duty clips, maintaining voltage to control units while the main battery is removed. This preserves adaptive values, positional data, and electronic presets that many systems require to operate correctly.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eOBD2 interface supplies power to vehicle ECUs while battery is disconnected\u003c\/li\u003e\n  \u003cli\u003eTwo battery clips (red positive, black negative) attach to an external 12V source\u003c\/li\u003e\n  \u003cli\u003eRetains throttle adaptation, window\/seat memory, radio and navigation settings\u003c\/li\u003e\n  \u003cli\u003eStraightforward four-step procedure for safe battery replacement\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs the device compatible with my car and how do I connect it?\u003c\/h3\u003e\n\u003cp\u003eThis tool works with essentially all 12V OBD2-equipped vehicles (generally 1996 and newer). One end is a standard OBD2 male connector; the other end has two insulated battery clips for secure attachment to a separate 12V backup battery.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFits 99% of modern 12V OBD2 vehicle ports\u003c\/li\u003e\n  \u003cli\u003eClip the red clamp to backup battery positive and black clamp to negative\u003c\/li\u003e\n  \u003cli\u003eLED indicators confirm successful OBD2 and backup battery connection\u003c\/li\u003e\n  \u003cli\u003eWorks with common 12V shop batteries, portable jump packs, or bench supplies\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat safety features and indicators does the MaxiBAS include?\u003c\/h3\u003e\n\u003cp\u003eThe MaxiBAS BTMS includes a built-in voltmeter, reverse-polarity protection, surge protection, and a three-LED status array so you can verify voltage and connection status before starting. These safeguards reduce risk to vehicle electronics and help you troubleshoot connection issues quickly.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eThree LEDs show connection and voltage status (green for OK, red for low)\u003c\/li\u003e\n  \u003cli\u003eStops current flow if backup battery polarity is reversed\u003c\/li\u003e\n  \u003cli\u003eSurge protection protects vehicle modules during connection\u003c\/li\u003e\n  \u003cli\u003eSimple visual pass\/fail makes pre-checks quick and reliable\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow easy is it to use the MaxiBAS during a routine battery replacement?\u003c\/h3\u003e\n\u003cp\u003eUsing the MaxiBAS requires just four clear steps: test the backup battery voltage, power off the vehicle, plug into the OBD2 port and attach the clips, then remove and replace the vehicle battery. The LED feedback helps you confirm that the backup has sufficient voltage (three green LEDs indicate ≥10V).\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eStep 1: Test backup battery; three green LEDs = adequate voltage\u003c\/li\u003e\n  \u003cli\u003eStep 2: Turn vehicle off before connecting\u003c\/li\u003e\n  \u003cli\u003eStep 3: Plug into OBD2, attach clips to backup battery\u003c\/li\u003e\n  \u003cli\u003eStep 4: Replace battery while ECU remains powered\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The 2026 Autel MaxiBAS BTMS OBD2 Memory Saver is designed for professional technicians, independent mechanics, auto-electricians, and DIY enthusiasts who service 12V vehicles and want to avoid time-consuming reprogramming or calibration after battery work. It’s especially useful in repair shops, service bays, and for anyone who routinely performs battery replacements, diagnostics, or electronic module work and needs a reliable, portable memory-preservation solution.\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: Will it work with my 2004 car?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — it’s compatible with virtually all 12V OBD2 vehicles, typically 1996 and newer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What indicates a safe backup battery connection?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Three green LEDs mean the backup battery is ≥10V and the connection is ready.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Autel","offers":[{"title":"Default Title","offer_id":55171451289943,"sku":"B0CZDKVZSN","price":85.01,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/autel-maxibas-btms-front-view.jpg?v=1790445872","url":"https:\/\/britishgarage.co.uk\/products\/autel-maxibas-btms-obd2-memory-saver-12v-obd2-battery-backup-with-voltmeter-protection","provider":"British Garage","version":"1.0","type":"link"}