Autel MaxiBAS BT608 Replacement Battery 7.7V 2700mAh

Autel MaxiBAS BT608 — 7.7V Li-Polymer Replacement Battery (TB2022)

This 7.7V, 2700mAh Li-Polymer battery replaces the TB2022 cell inside the Autel MaxiBAS BT608 automotive diagnostic scanner. The BT608 is a professional battery and electrical system tester used in workshop environments for vehicle analysis and fault diagnosis. Swap this in when the original cell no longer holds enough charge to complete a full diagnostic session.

• MaxiBAS BT608 fit: The TB2022 is the single Li-Polymer cell specific to the BT608 platform. Voltage rail, connector pinout, and BMS communication protocol match the original — the scanner firmware handshakes with the battery management circuit during boot to confirm cell status before allowing operation.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on a BT608 unit. The BMS held the charge curve within spec, the scanner booted cleanly, and the cell voltage at rest stabilised at 7.7V nominal without deviation between cycles.
• Data export before swapping: Export all saved vehicle profiles and session logs before removing the original battery. The BT608 stores active vehicle data in RAM backed by the main cell — cutting power without exporting first wipes unsaved records permanently.

BT608 not powering on after battery installation

A freshly installed TB2022 cell may ship at a storage charge well below the BT608's boot threshold. The scanner firmware requires a minimum cell voltage before it will initialise — if the cell sits below that floor, the unit appears completely dead even though the battery is functional. Plug the BT608 into the charger for at least 30 minutes before attempting to power on. If the scanner still does not boot, check the cell voltage at the charge port — it should read above 7.0V before the boot sequence will trigger.

Wireless connection dropping mid-diagnostic session

The BT608's Bluetooth radio draws a surge of current when maintaining an active link during heavy diagnostic polling. At low battery states, the cell voltage sags enough under that load to cause the wireless module to reset mid-session — the scanner stays on but the vehicle link drops. This is not a software fault. Keep the cell above 50% charge during sessions that involve continuous live data streaming. If drops persist after a fresh charge cycle, check that the cell resting voltage holds at or above 7.5V after a full charge.