About this replacement
DoorLock DL-24 — 7.5V Alkaline Replacement Battery
This is a 7.5V alkaline replacement battery rated at 2300mAh (17.25Wh), sized at 70.70 × 52.00 × 14.20mm. It fits the DoorLock DL-24 electronic door lock. Voltage and physical dimensions match the original cell pack this lock was built around.
- DL-24 fit: The DL-24 draws a steady low-current load from its control board and motor driver. At 7.5V, the voltage rail sits within the tolerance band the lock's microcontroller expects — drop below that and the board may refuse commands or trigger a false low-battery warning before the cell is actually exhausted.
- Bench tested on actual hardware: We cycled this battery through the DL-24's motor actuation sequence and monitored the BMS response across multiple lock and unlock events. Voltage held stable under the brief current spike the deadbolt motor draws on engagement, with no cutoff events recorded.
- Post-swap access method check: After fitting this battery, test every access method — keypad, Bluetooth, and any keycard — before closing the door. The DL-24 runs a firmware handshake after a power interruption, and some access methods will not respond until that sequence completes.
Why the DL-24 stops responding immediately after a battery swap
The DL-24's control board initialises on power-up and expects a clean voltage at or above its threshold within a set window. If the board doesn't complete that boot cycle — due to slow battery seating or partial contact — it can sit in a locked-out state that looks like a dead battery. Remove the battery pack, wait ten seconds, then reinsert firmly until the latch clicks. The lock should beep or flash to confirm a successful power-on handshake.
Low battery warning appears immediately after fitting new batteries
The DL-24 reads cell voltage at startup to set its battery status flag. If the replacement battery has been sitting in storage, its resting voltage may have drifted below the 7.5V nominal, triggering the warning before any load is even applied. Verify polarity first — reversed orientation will read as 0V and trip the same alert. If polarity is correct and the warning persists, measure the pack voltage with a multimeter; a fresh alkaline at 7.5V nominal should read at or above 7.8V open circuit when new.