Record STG19 Automatic Door Replacement Battery 19.2V 2000mAh

Record STG19 / STM 21 / BAT 19 — 19.2V Ni-MH Replacement Battery (80100505)

This 19.2V, 2000mAh Ni-MH battery replaces the backup power cell in Record automatic door operators, covering the STG19, STM 21, and BAT 19 platforms. When mains power fails, this battery keeps the door operator running so the door can complete its open or close cycle. Capacity is 38.4Wh as rated by the manufacturer.

• STG19, STM 21, and BAT 19 compatibility: These three Record door operator models share the same 19.2V battery rail, connector format, and BMS communication protocol — one cell pack covers all three without modification.
• Bench tested on actual hardware: We cycled this pack through simulated mains-fail events and confirmed the BMS hands off to battery backup without trip delay, completing a full door open-and-close cycle under load each time.
• Post-install verification: After installing the backup battery, manually trigger a power-fail test during a low-traffic period — Record door backup batteries must be tested at installation to confirm they can complete a full door cycle under real motor load before the site returns to normal operation.

Automatic door not completing full open cycle on battery backup

The Record STG19 controller monitors battery voltage during the motor-start surge. If voltage sags below the controller's cutoff threshold at that surge point, the controller halts the cycle mid-stroke as a protection measure. A partially degraded Ni-MH pack may read 19.2V at rest but collapse under load. A fresh replacement pack should hold above 17V during the motor-start draw to allow a full cycle to complete.

Door controller losing its programmed settings after a mains outage

The STG19 controller stores timing, force, and access settings in volatile RAM backed continuously by the backup battery. If that battery has depleted through self-discharge or age, even a brief mains interruption wipes those settings. This failure is separate from whether the door moves — the door may not move at all after reprogramming is lost. Replace the battery, charge it fully for 24 hours, then re-enter the controller's programming sequence before the next power-fail test.