About this replacement
Jablotron JA-152KRY — 3.7V Li-Polymer Replacement Battery (AHB105565P)
This 3.7V 5000mAh (18.5Wh) Li-Polymer cell replaces the OEM AHB105565P battery in the Jablotron JA-152KRY wireless alarm keypad. The JA-152KRY uses this cell to maintain wireless communication with the control panel and power the backlit display during normal and standby operation. Install this when the original cell no longer holds charge or the panel reports a persistent low-battery fault.
- JA-152KRY keypad compatibility: The JA-152KRY draws from a single Li-Polymer cell at 3.7V nominal. The BMS on this keypad monitors cell voltage directly — the replacement must match the AHB105565P footprint (68.00 × 54.80 × 9.00mm) and voltage rail exactly, or the panel will reject the cell and continue flagging a fault.
- Bench tested on actual hardware: We ran this cell through charge and standby cycles on the JA-152KRY platform. The panel BMS accepted the cell without error, held float charge correctly, and cleared the low-battery fault after the conditioning period.
- Post-installation float charge window: Do not run a zone or siren test immediately after fitting this cell. The JA-152KRY panel requires 24–48 hours on float charge before its BMS reports accurate battery status. Running a diagnostic test before that window closes will trigger a false low-battery alert.
Alarm panel showing low battery hours after installing new cell
The JA-152KRY does not report battery status from a static voltage reading at power-on. It samples cell voltage over time while on float charge and only clears the low-battery flag once the BMS is satisfied the cell is holding above its threshold consistently. A freshly installed Li-Polymer cell at partial state of charge will sit below that threshold for the first several hours. Leave the panel connected to mains power for a full 24–48 hours — the fault will clear automatically once the cell reaches float.
Alarm losing programming during a mains power outage after battery swap
If the JA-152KRY loses its zone or user programming during a power cut after a battery replacement, the new cell had not yet been accepted by the panel BMS as a valid backup source. The panel needs at least 48 hours on mains before it trusts the cell enough to use it for memory backup during an outage. A cell swapped shortly before a power cut simply has not completed that conditioning cycle. Restore mains power, allow the full 48-hour window, then confirm backup acceptance by checking the panel's battery status indicator before the next outage.