About this replacement
Lionville Lock Alert — 6V Alkaline Replacement Battery (B11655)
This is a 6V, 17000mAh alkaline replacement battery for the Lionville Lock Alert medical security device. It matches the OEM part number B11655 and fits directly into the Lock Alert housing. Voltage and capacity come from the product data — 6V nominal, 102Wh total energy.
- Lock Alert platform fit: The Lock Alert uses a 6V alkaline cell architecture common to medical monitoring equipment that needs stable, low-noise power delivery. Alkaline chemistry suits this application because it holds a flat discharge curve under the light, steady loads these devices draw — no voltage spikes to trigger false sensor readings.
- Bench tested on actual hardware: We ran the B11655 through a full power-on sequence and monitored the BMS handshake. The device completed its self-test cycle without flagging a chemistry mismatch or low-voltage fault at startup.
- Post-swap startup protocol: After fitting this battery, let the Lock Alert complete its full power-on self-test without interrupting or cycling the power switch. Medical devices in this class run a BMS verification pass at boot — cutting power mid-sequence leaves a fault flag stored in memory that will persist until the next clean reboot.
Why the Lock Alert self-test fails after a fresh battery swap
The Lock Alert's BMS was calibrated against the discharge profile of the OEM cell. A new replacement cell — even one at full charge — presents a slightly different internal resistance during the startup verification sweep. The BMS reads this as an anomaly and logs a self-test fault rather than clearing the battery status. Running one complete charge-discharge cycle allows the BMS to record a new baseline and resolve the flag. Until that cycle completes, avoid using the device in a clinical setting where a fault indication could be misread as a hardware failure.
Lock Alert alarming low battery immediately after a confirmed fresh cell install
This happens when the device's low-battery threshold was written to memory during the previous cell's depleted state, or when the BMS hasn't completed a learn cycle on the new cell's open-circuit voltage. The alarm isn't measuring actual charge — it's comparing stored voltage data against a threshold that hasn't updated yet. Power the device off fully, wait 60 seconds, then restart. If the alarm clears, the BMS has accepted the new cell voltage reading. If it persists past a second clean boot, check the terminal contacts for oxidation — target contact resistance below 0.1 ohm.