Babyalarm BC-5700D Compatible Battery 3.7V 1100mAh Li-Polymer

Babyalarm BC-5700D — 3.7V Li-Polymer Replacement Battery (GSP053450PL)

This 3.7V, 1100mAh lithium-polymer battery replaces the original power cell in the Babyalarm BC-5700D and Neonate BC-5700D parent unit. It fits the parent-side handset — not the nursery camera unit. OEM part number GSP053450PL confirms the correct fit for this babyphone model.

• BC-5700D and Neonate BC-5700D parent unit: Both variants share the same parent unit housing, connector pinout, and 3.7V power rail, so a single cell covers both. The BMS in this unit monitors cell voltage directly — a mismatched cell causes the parent unit to report low battery immediately after charging.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the BC-5700D parent unit. The BMS accepted the cell without error flags, held the charging current steady, and terminated at the correct cutoff voltage without requiring a manual reset.
• Wireless link after battery swap: The BC-5700D parent unit drops its pairing with the nursery camera whenever it loses power completely. After fitting this battery, charge the unit first, then hold the pairing button on both the parent unit and the camera unit until the link indicator confirms re-registration.

Parent unit battery draining overnight with screen active

Night-time monitoring with the parent unit screen permanently on is a sustained draw that pulls the 1100mAh cell down faster than typical daytime use. The LCD backlight and radio receiver running together keep current draw elevated for hours. Enable the screen timeout setting in the BC-5700D menu so the display dims when no alert is active. The radio link stays live even with the screen off, so you won't miss audio or motion alerts.

Range drops noticeably right after fitting a new battery

The BC-5700D's radio transmitter draws its power directly from the cell voltage, and a freshly installed battery that hasn't completed its first full charge sits below the 3.7V nominal. At low cell voltage, transmit power is reduced and effective range shrinks. This is not a fault — it resolves once the cell reaches a full charge. Charge the parent unit to 100% before testing range; you should see the full rated coverage restore at that point.