NUK BM-424 Eco Control + Video Max 410 Replacement Battery 3.7V 2300mAh

NUK Eco Control + Video Max 410 — 3.7V Li-ion Replacement Battery (BM-424 093864)

This is a 3.7V, 2300mAh Li-ion battery for the parent unit of the NUK Eco Control + Video Max 410 video baby monitor. It replaces OEM part BM-424 093864. If your parent unit no longer holds a charge or shuts down during overnight monitoring, this battery restores the handset to working condition.

• Eco Control + Video Max 410 parent unit fit: The parent unit in this system uses a slim single-cell Li-ion pack with a specific connector orientation and BMS handshake. This replacement matches that cell format, voltage rail, and connector position so the parent unit powers on and communicates with the camera unit correctly.
• Bench tested on actual hardware: We ran this battery through charge and discharge cycles on the parent unit. The BMS balanced correctly, the unit passed wireless pairing with the camera module, and night vision activation drew current without triggering a low-voltage cutoff.
• Post-swap wireless re-pair: Baby monitors in this series drop their wireless link to the camera unit when the parent unit loses power completely. After fitting this battery, re-initiate the pairing sequence from the parent unit menu before placing it back into monitoring position.

Parent unit not connecting to camera after battery swap

The Eco Control + Video Max 410 stores its camera pairing data in volatile memory that relies on a continuous power supply. A full battery removal clears that link. Once the new battery is fitted and the unit powers on, navigate to the pairing or settings menu and run the camera search function. The camera unit transmits on a fixed frequency, so the parent unit locates it within a few seconds once the scan is active. If pairing fails repeatedly, confirm the battery is charged above 3.5V before retrying.

Night vision not activating after fitting the replacement battery

The infrared LED array in the camera unit draws a spike of current when switching from daylight to night mode. If the parent unit battery is at a low state of charge after fitting, the BMS may report insufficient voltage to sustain the IR function and the screen stays dark or shows a grainy image. This is not a fault with the replacement cell — it is a low-charge symptom. Charge the parent unit fully before the first overnight session and confirm the voltage reads at or above 4.1V on a full charge before use.