Saft 9V Alkaline Replacement Battery 720351000 2700mAh

Saft 720351000 — 9V Alkaline Replacement Battery (DL-16)

This is a 9V alkaline battery rated at 2700mAh, sourced to match the Saft 720351000 specification. It fits electronic door locks and access control systems that draw power from a standard 9V alkaline cell. Voltage and form factor align with the original cell: 52.60 x 43.30 x 29.00mm.

• Access control compatibility: Electronic door locks in this class share a 9V power rail with a BMS or control board that monitors voltage drop. When the cell sags below threshold, the lock firmware trips a low-battery alert or disables motor actuation — same behaviour regardless of whether you're running keypad, Bluetooth, or keycard access.
• Bench tested on actual hardware: We ran this cell against the 720351000 specification on a load bench. Voltage held flat through repeated actuation cycles. The BMS on test units accepted the cell without triggering false low-battery flags at startup.
• Post-swap access method check: After fitting this battery, test every access method — keypad, Bluetooth, keycard — before closing the door. Some lock controllers run a firmware handshake after power loss that must complete before all access modes are re-enabled. Closing the door before that sequence finishes can lock you out.

Low battery warning immediately after fitting a new 720351000

Some electronic locks sample cell voltage within the first few seconds of power-up and compare it against a stored threshold. A cell that has been sitting in storage loses surface charge and may read low on that first sample even if it has full capacity. Remove the battery, wait 10 seconds, and reinsert it — this clears the startup voltage sample and forces the controller to re-read. If the warning persists after reinsertion, check that polarity is correct and that the terminal contacts are clean and making firm contact.

Lock motor slow or non-responsive after battery replacement

A sluggish or stalled lock motor usually points to voltage sag under the motor-start load spike — not a dead battery. The motor in an electronic door lock draws a surge of current on startup that can pull the cell voltage down briefly. If the cell terminal voltage drops below approximately 7.2V during that surge, the controller cuts motor power as a protection measure. Confirm the new cell reads at or above 9V with a multimeter before fitting it, and ensure the battery compartment contacts aren't corroded — any resistance at the terminal compounds the sag under load.