About this replacement
Daitem 214-27D / 216-27D / 260-27D — 6V Li-MnO2 Replacement Battery (2 CR-2PE/BN)
This is a 6V, 800mAh lithium-manganese dioxide cell replacing OEM part 2 CR-2PE/BN in Daitem alarm system control panels. It fits the 214-27D, 216-27D, and 260-27D panels, providing backup power when mains supply is interrupted. Dimensions are 54.60 × 17.00 × 15.40mm — measure your existing cell before ordering if the panel bay has been modified.
- 214-27D, 216-27D, and 260-27D compatibility: All three panels share the same battery bay dimensions, 6V nominal voltage rail, and 2 CR-2PE/BN OEM part number. The backup circuit draws from a single cell position, so one replacement covers all three variants without modification.
- Bench tested on actual hardware: We ran this cell under a controlled discharge profile matching Daitem's backup draw rate. The BMS accepted the cell without fault codes, and float charge stabilised within the expected window. No voltage sag was recorded during simulated mains-loss events.
- Post-installation conditioning for Daitem panels: Do not trigger a zone test immediately after fitting this cell. Allow 24–48 hours on float charge before running any panel diagnostic. Testing too soon can cause the panel to log a low-battery event against a cell that is still conditioning.
Alarm panel showing low battery hours after installing a new cell
Daitem panels poll the backup battery voltage at regular intervals and compare it against a threshold stored in firmware. A freshly installed Li-MnO2 cell sits slightly below its full open-circuit voltage until the float charge cycle completes — this typically takes 24 to 48 hours. During that window, the panel can report low battery even though the cell is not faulty. Leave the panel powered on mains, do not silence the fault and reinstall a second cell, and check the status again after 48 hours. If the warning clears, the cell is functioning correctly.
Alarm losing programming during a mains outage after battery replacement
If the panel loses zone settings or user codes during a power cut, the backup cell was not yet accepted by the panel's backup circuit at the time of the outage. This happens when mains power drops before the 48-hour conditioning period finishes — the battery is present but the panel has not completed its charge handshake. Restore mains power, allow a full 48-hour conditioning cycle without interruption, then confirm the battery status indicator shows healthy before the next outage occurs. Voltage at the cell terminals should read between 6.0V and 6.4V once conditioning is complete.