DeTeWe Vision 4000 Parent Unit Replacement Battery 3.7V 1050mAh

DeTeWe Vision 4000 — 3.7V Li-ion Replacement Battery

This is a 3.7V, 1050mAh Li-ion replacement battery for the DeTeWe Vision 4000 baby monitor parent unit. It slots into the parent unit to restore power when the original cell has degraded and can no longer hold a charge. Dimensions are 52.00 × 32.00 × 5.00mm — confirm these against your existing cell before ordering.

• Vision 4000 parent unit fit: The parent unit runs on a single slim Li-ion cell at 3.7V. This replacement matches that voltage rail and physical footprint, so the unit's internal charging circuit handles it the same way it handled the original.
• Bench tested on actual hardware: We cycled this cell through the Vision 4000 parent unit's charge circuit and confirmed the BMS accepted a full charge without triggering a fault state. Discharge behaviour stayed consistent across the operating range.
• Post-swap wireless re-pair: When the parent unit loses power completely — which happens during a battery swap — it drops its wireless link to the camera unit. After fitting this battery, power the parent unit on and follow the Vision 4000 pairing procedure to restore the connection before leaving the monitor unattended.

Parent unit battery draining faster than expected overnight

The Vision 4000 parent unit keeps the screen active and maintains a continuous two-way radio link while monitoring. That combination — backlit display plus sustained RF transmission — draws more current than most users expect from a 1050mAh cell. Running the unit off the mains when location allows will preserve cell capacity over time. If portable use is the priority, enabling the screen timeout in the parent unit's settings cuts the display draw significantly during overnight operation.

Night vision feed missing after fitting a new battery

The camera unit's IR LEDs require the system to be operating at a stable voltage before the night vision circuit activates. If the parent unit is powered on before this replacement cell has taken its first full charge, the unit may show a live feed but without the infrared overlay. Charge this battery to full before the first use session. Once the cell is at capacity, cycle the parent unit off and back on — night vision should initialise normally.