About this replacement
DoorLock DL-41 — 6V Alkaline Replacement Battery
This is a 6V alkaline replacement battery with 2300mAh capacity for the DoorLock DL-41 smart door lock. It powers the lock motor, keypad, and wireless connectivity module. Dimensions are 56.60 x 52.30 x 14.40mm — confirm fit before ordering.
- DL-41 compatibility: The DL-41 runs a single 6V alkaline cell to feed both the deadbolt motor and the keypad backlight on the same voltage rail. Splitting those loads across mismatched chemistry or voltage causes erratic keypad response and missed Bluetooth handshakes.
- Bench tested on actual hardware: We cycled this battery through the DL-41's motor-start draw and keypad polling sequence. The cell held above 5.8V through repeated lock-unlock cycles and Bluetooth pairing events without triggering a low-battery cutoff.
- Post-swap access check: After fitting the battery, test every access method — keypad, Bluetooth app, and any keycard — before closing the door. The DL-41 runs a firmware handshake after power interruption, and some access methods stay locked out until that sequence completes.
Why the DL-41 beeps low battery immediately after a fresh install
The DL-41's low-battery threshold sits at approximately 5.4V. Alkaline cells that have been sitting in warehouse storage can measure 6V open-circuit but sag below 5.4V the moment the motor pulls current. The lock interprets this sag as a depleted cell and fires the warning tone. Use a battery purchased recently — cells stored longer than 18 months are the most common cause of this symptom.
Bluetooth not connecting to the DL-41 after a battery swap
Cutting power to the DL-41 resets its Bluetooth stack, and the module does not automatically re-advertise to previously paired phones on all firmware versions. Open the lock's companion app, navigate to device settings, and force a re-pair rather than waiting for an automatic reconnect. If the app shows the lock as offline after pairing, remove and reinsert the battery once to complete the BMS initialisation cycle, then retry the app connection.