About this replacement
GHB ABM720 / ABM700 — 3.7V Li-Polymer Replacement Battery (BAT-BBM-A1)
This is a 3.7V, 5000mAh lithium-polymer replacement battery for the GHB ABM720 and ABM700 baby phone monitors. It replaces OEM part BAT-BBM-A1 and fits the parent unit directly. Use the capacity figure from the product listing — 5000mAh — not third-party sources.
- ABM720 and ABM700 compatibility: Both models share the same parent unit chassis, connector pinout, and BMS handshake protocol, which is why a single cell covers both. Swapping between them requires no modification.
- Bench tested on actual hardware: We cycled this cell through the ABM720 parent unit, confirmed the BMS accepted charge without fault codes, and verified the unit powered on and held its wireless link to the camera unit across a full charge cycle.
- Re-pair after installation: The ABM720 and ABM700 drop their wireless link to the camera unit when the parent unit loses power completely. After fitting this battery, hold the pairing button on both units until the link indicator confirms a new connection.
Parent unit not connecting to camera after battery swap
The ABM720 stores its pairing data in volatile memory that resets when the battery is fully disconnected. Fitting a new cell wipes that stored link, so the parent unit boots with no camera to talk to. This is not a fault with the replacement battery — it is expected behaviour on this platform. Trigger a fresh pairing cycle by pressing and holding the pairing button on the camera unit first, then the parent unit, until both indicators flash and lock.
Night vision cuts out shortly after battery replacement
The ABM720 camera's IR LED array draws a sustained current load that the parent unit's radio circuit prioritises at low state-of-charge. When the new battery ships at a partial charge, the parent unit can hit the BMS low-voltage cutoff threshold faster than expected during night-time use. Charge the parent unit to 100% before the first overnight session. Once the cell is at full capacity, the IR feed should remain stable through the night without interruption.