Messerschmitt 6VQ-02 Automatic Door Replacement Battery 6V 2600mAh

Messerschmitt 6VQ-02 — 6V Alkaline Replacement Battery (80100601)

This is a 6V, 2600mAh alkaline replacement battery for the Messerschmitt 6VQ-02 automatic door operator. It replaces OEM part number 80100601. The battery backs the electronic control system that manages door actuation in commercial and industrial automatic door installations.

• 6VQ-02 controller compatibility: The 6VQ-02 control board draws from a dedicated 6V backup rail. This battery matches that rail voltage and the physical envelope — 56.70 × 52.00 × 14.30mm — so the connector seates correctly without adapters or modification.
• Bench tested on actual hardware: We ran load cycles through the control board's backup circuit. The battery held voltage above the controller's low-voltage cutoff threshold through repeated full open-and-close door cycles under simulated load.
• Post-installation backup test: After fitting this battery, manually trigger a mains-fail test during a low-traffic period before relying on it in service. Automatic door backup circuits must complete at least one full door cycle under real load to confirm the battery is charged and the backup activation relay is functioning.

Door controller losing programming after a mains power outage

The 6VQ-02 stores its configuration — travel limits, force settings, and open/close timing — in volatile RAM. That RAM relies on the backup battery to retain data when mains power drops. If the battery is depleted or absent, the controller resets to factory defaults on every outage. A fresh battery at full charge is required before the controller can hold its programming through a power failure. After fitting the replacement, check all door travel limits and timing parameters before returning the door to normal service.

Battery backup not activating when mains power is cut

If the door stays inoperative during a mains failure instead of switching to battery mode, the backup activation circuit is the first thing to check. The 6VQ-02's backup relay requires the battery to be above its minimum operating voltage before it will engage — a partially discharged alkaline battery may read close to 6V at rest but collapse under the inrush current of the door motor. Test by disconnecting mains deliberately and observing whether the door responds to a manual trigger. If it does not respond, measure battery terminal voltage under load; anything below 5.4V under motor-start draw points to a battery that needs replacement.