Autel MaxiBAS BTMS OBD2 Car Battery Memory Saver – Preserve Vehicle Data During Battery Replacements

Preserve vehicle data during battery maintenance

The 2026 Autel MaxiBAS BTMS memory saver is a flagship tool designed for professional shops and enthusiastic DIYers. By staying powered through a connected 12V backup battery, it helps retain critical vehicle information—codes and electronic presets—so your car doesn’t lose configuration when the main battery is swapped or disconnected. This keeps the workflow smooth and minimizes post-maintenance adjustments.

Built to work with a wide range of 12V vehicles, the BTMS plugs into the OBD2 port and clamps to a backup battery, providing a reliable power bridge during battery changes. The result is a calmer, more predictable replacement process with less risk of setting reset or display anomalies. While this device can help preserve data and settings, it does not replace proper diagnostic procedures or vehicle manuals; use it as a safeguard for ongoing data integrity during maintenance.

Key benefits at a glance

• Preserves vehicle codes and electronic presets during battery replacement, reducing post-service reconfiguration.
• Connects to a 12V backup battery with two clamps to ensure uninterrupted power supply.
• Compatible with nearly all 12V OBDII vehicles manufactured since 1996, broad shop applicability.
• Built-in voltmeter and reverse polarity protection help verify safe operation before and during replacement.
• LED indicators provide quick status feedback: connection success, voltage level, and safe operation indicators.
• Surge protection and a 1-year warranty add peace of mind for professional use.

How to use in four simple steps

• Step 1: Check the backup battery voltage with the built-in voltmeter; ensure it shows sufficient power (typically above 10V).
• Step 2: Power off the vehicle before disconnecting the main battery.
• Step 3: Connect the BTMS OBD2 plug to the vehicle and attach the red/black clips to the backup battery terminals.
• Step 4: Proceed with the battery replacement; vehicle memory data remains accessible.

Why it matters for your shop

Professional environments benefit from fewer surprise resets and faster turnaround when replacing batteries. The BTMS helps safeguard memory-related settings, reduces diagnostic time, and supports data continuity across service events. If you have questions or need accessories, Autel offers support and warranty coverage to help keep operations running smoothly.