Saflok 54490 6V Replacement Battery 2300mAh Alkaline

Saflok 54490 / DL-2 Series — 6V Alkaline Replacement Battery

This is a 6V alkaline replacement battery rated at 2300mAh (13.8Wh) for Saflok electronic door locks. It fits the 54490, 884955, DL-2, EDL4AS, and additional models in the same series. The voltage and form factor match the original cell that powers the lock's motor, keypad, and access control logic.

• Saflok 54490 and DL-2 series fit: These locks share the same 6V battery bay, connector orientation, and BMS threshold. The lock's control board reads supply voltage on startup — feeding it the wrong voltage or a partially drained cell will trigger a fault state before the motor receives a command.
• Bench tested on actual hardware: We ran this cell on a DL-2 unit and confirmed the control board accepted the battery without a fault flag. The motor completed a full lock and unlock cycle, and the keypad acknowledged input correctly throughout.
• Post-swap access verification: After fitting this battery, test every access method — keypad code, keycard, and any Bluetooth credential — before closing the door. Some Saflok units run a firmware handshake after a power interruption, and the lock may not accept all access methods until that sequence completes.

Why the Saflok DL-2 shows a low-battery warning immediately after a fresh install

The Saflok control board samples supply voltage within the first few seconds of power-up. If the cell voltage reads below the lock's internal threshold — typically around 5.4V — the low-battery flag triggers regardless of capacity. Alkaline cells sitting in storage can drop to 5.6–5.8V open-circuit, which passes the shelf test but trips the threshold under the motor's startup load. Always use freshly sourced alkaline cells and confirm the open-circuit voltage reads at or above 6V before fitting.

Lock motor moves slowly or fails to fully retract the bolt after battery swap

A slow or stalled bolt is almost always a voltage sag issue, not a mechanical fault. When the motor draws peak current to move the bolt, a weak cell's voltage collapses mid-cycle and the control board cuts power to protect the circuit. This can look like a seized mechanism but clears once you fit a cell at full 6V. Check the replacement cell with a multimeter before installing — anything below 5.8V under no load is already too depleted for reliable motor operation.