About this replacement
V Tech RM5764HD / RM5764-2HD — 3.7V Li-Polymer Replacement Battery (634169)
This 3.7V, 2000mAh lithium-polymer battery fits the parent unit of the V Tech RM5764HD and RM5764-2HD baby monitors. It replaces OEM part 634169 when the original cell degrades and can no longer hold charge through overnight use. Capacity is 2000mAh (7.4Wh) — identical to the factory specification.
- RM5764HD and RM5764-2HD parent units: Both models share the same parent unit hardware — same voltage rail, same connector pinout, and the same BMS handshake protocol. One battery covers both.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the RM5764HD parent unit. The BMS accepted the cell without fault codes, and the protection circuit tripped correctly at low-voltage cutoff.
- Post-swap wireless re-pair: When the parent unit loses power completely during a battery swap, it drops its wireless link to the camera unit. After fitting this battery and powering on, run the pairing sequence from the parent unit menu before placing the monitor back in use.
Parent unit battery draining overnight on the RM5764HD
Night-time monitoring with the LCD screen active is a sustained draw — the display, radio link, and speaker circuit all run simultaneously. An aged cell with reduced capacity cannot sustain this load across a full night. This replacement cell restores the original 2000mAh capacity. To reduce draw further, enable the screen timeout setting in the parent unit menu so the display cuts off between audio alerts.
Night vision not activating after battery replacement
The camera unit's IR LEDs require the parent unit to be at a stable operating voltage before they negotiate the night-vision mode. If the parent unit battery is low immediately after a swap, the handshake can fail and night vision stays off. Charge the parent unit to full — indicated by a solid charge LED — before switching to night-vision mode. If the IR feed still doesn't appear, toggle night vision off and back on from the parent unit controls once fully charged.