Axvue Video Monitor 140 Replacement Battery 3.7V 1200mAh

Axvue Video Monitor 140 — 3.7V Li-Polymer Replacement Battery (PL803443)

This 3.7V, 1200mAh Li-Polymer battery replaces the original PL803443 cell in the Axvue Video Monitor 140 parent unit. It restores wireless, portable monitoring when the factory battery no longer holds a charge. Voltage, capacity, and connector match the original parent unit specification.

• Video Monitor 140 parent unit fit: The parent unit runs a 3.7V Li-Polymer cell on a single-cell BMS. The PL803443 shares the same 45 × 33.3 × 8mm footprint and connector orientation, so the cell seats correctly without forcing the housing.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the parent unit. The BMS accepted the cell without flagging a fault, and the unit reached full charge without thermal events.
• Post-swap re-pairing: After fitting this battery, the parent unit will likely show no camera feed. A full power loss — which happens during every battery swap — clears the wireless pairing. Power on both units and follow the Video Monitor 140 pairing sequence in the manual to restore the camera link.

Parent unit signal range reduced after battery replacement

The Video Monitor 140 parent unit's radio transmitter draws from the same cell powering the screen and processor. When the battery is below roughly 3.5V, the radio power output drops and range shrinks noticeably. This is not a pairing fault — it is a voltage issue. Charge the parent unit fully before testing range after a battery swap.

Night vision feed goes dark on the parent unit screen

The camera unit's IR LEDs are powered by the camera's own supply, but the parent unit's display processing for low-light frames requires stable voltage. If night vision appears blank or flickering shortly after a battery swap, the new cell may not yet be at operating voltage. Charge the parent unit to full — at least 4.1V on the cell — before switching to night-view mode.