About this replacement
Babymoov A014304 / Babyphone Handy Care — 3.7V Li-Polymer Replacement Battery (YJ902040)
This 3.7V 700mAh Li-Polymer battery fits the Babymoov A014304 and Babyphone Handy Care parent unit — the handheld receiver you carry around the house while the camera stays in the nursery. It replaces OEM part YJ902040 directly, matching the original cell's footprint at 43.00 × 19.80 × 8.80mm.
- A014304 and Babyphone Handy Care parent unit fit: Both devices run the same parent-unit hardware platform with an identical battery bay, connector pinout, and 3.7V power rail. One cell covers both.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on the parent unit and confirmed the BMS accepted the cell without triggering a fault, held the voltage curve through screen-on operation, and released charge cleanly to the display and radio circuits.
- Re-pair after install: Baby monitors drop their wireless link when the parent unit loses all power. After fitting this battery, power the parent unit on and re-pair it with the camera unit using the pairing button before relying on it overnight.
Parent unit range reduction after battery swap
The A014304 parent unit's radio transmit power scales with supply voltage. A partially charged replacement cell delivers less than the 3.7V nominal rail, which reduces effective wireless range — sometimes dramatically in a larger home. This is not a fault with the battery or the unit. Charge the replacement fully before the first night of use. A full charge brings the cell to approximately 4.2V and restores the radio circuit to its rated output.
Night vision feed dropping out after battery replacement
Night vision on the camera unit draws heavier current from the IR LED array, and the parent unit's display must simultaneously decode and render the low-light feed. If the replacement battery is not fully charged, the parent unit's voltage sags under this combined load and the feed cuts out or shows static. This is a voltage floor issue, not a compatibility problem. Charge the parent unit to full — 4.2V at the cell — before using night vision mode.