V-Tech Baby BM1000 Replacement Battery 3.7V 1000mAh

V-Tech Baby BM1000 — 3.7V Li-ion Replacement Battery (BT298555)

This is a 3.7V, 1000mAh Li-ion replacement battery for the V-Tech Baby BM1000 parent unit. It fits the BM1000 Digital Audio Baby Monitor, BM4200, and Safe & Sound Baby Monitor parent units using OEM part BT298555. Restores the parent unit's ability to operate away from the wall socket.

• BM1000 and BM4200 parent unit compatibility: Both models share the same 3.7V single-cell Li-ion platform, BT298555 connector footprint, and BMS handshake protocol — the same cell fits both without modification.
• Bench tested on actual hardware: We ran this cell in a BM1000 parent unit and confirmed the BMS accepted the charge cycle without faults, voltage held steady across the wireless radio and display draw, and the unit exited low-battery warning correctly.
• Re-pair after every power interruption: When the parent unit drops to zero volts during a battery swap, it loses its stored wireless link to the camera unit. After fitting the new battery, hold the pair button on both units until the link LED confirms a fresh handshake — do not skip this step.

Parent unit draining overnight during night-time monitoring

Running the BM1000 parent unit all night with the screen active is a sustained draw across the display backlight, speaker amplifier, and 2.4GHz radio simultaneously. A degraded original cell cannot sustain that load across a full night. The 1000mAh rating on this replacement matches the factory spec — but the screen timeout setting in the parent unit menu cuts display draw between sound activations, which significantly reduces overnight drain. Enable it before the first night of use.

Night vision not working after fitting the replacement battery

The camera unit's IR LEDs draw more current than the standard video circuit, and if the parent unit battery is below roughly 3.5V, the BM1000 can fail to negotiate full IR mode with the camera. This is not a camera fault. Charge the replacement battery to full before the first use — the parent unit needs to present the correct voltage to the camera during the handshake that enables night vision. If IR still fails, power both units off, charge the parent unit to 100%, then reconnect.