About this replacement
Optex iVision+ Handheld Monitor — 3.6V Ni-MH Replacement Battery (OPIVPBAT)
This is a 3.6V, 800mAh Ni-MH replacement cell for the Optex iVision+ handheld monitor. It fits the portable monitor used in alarm system field operations and zone testing. Capacity matches the original OPIVPBAT specification at 2.88Wh.
- iVision+ monitor fit: The iVision+ uses a single 3.6V Ni-MH cell on a fixed voltage rail with a BMS that validates cell chemistry before accepting charge. Swapping to a different voltage or chemistry causes the monitor to reject the cell entirely.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on the iVision+ platform. The BMS accepted the cell cleanly, reached float charge without fault codes, and held voltage within the expected 3.6V nominal window throughout.
- Post-installation conditioning on the iVision+: Do not run a full zone diagnostic test immediately after fitting this cell. Allow 24–48 hours on charge first. The iVision+ monitor reports battery state based on float charge acceptance — a cell that has not completed its first full charge cycle will trigger a low battery warning even if the cell itself is good.
Why the iVision+ still shows low battery hours after fitting a new cell
The iVision+ does not reset its battery status indicator at the moment of cell swap. It monitors float charge acceptance over time and updates its status only after the new cell has been held at charge for a sustained period. A freshly installed cell sitting at resting voltage — without completing a full charge cycle — reads as indeterminate to the monitor's BMS. Leave the device on charge for a minimum of 24 hours before drawing any conclusion from the battery status indicator.
iVision+ powering off mid-test with no warning
Ni-MH cells that have been stored for extended periods before installation can have suppressed open-circuit voltage. When the monitor draws current for active zone testing, the cell voltage drops sharply below the BMS cutoff threshold and the unit shuts down. This is not a faulty cell — it is a cell that has not yet been reconditioned. Run one full charge-discharge cycle before using the monitor in the field. After reconditioning, resting voltage should return to approximately 3.6V.