Cobra CP200 Replacement Battery 4.8V 2000mAh Ni-MH

Cobra CP200 / CP200S — 4.8V Ni-MH Replacement Battery

This 4.8V, 2000mAh Ni-MH battery replaces the rechargeable cell in the Cobra CP200 and CP200S baby monitor parent unit. The parent unit runs on this pack to maintain the audio and two-way communication link with the nursery unit. Voltage and capacity match the original specification exactly.

• CP200 and CP200S compatibility: Both models use the same parent unit housing, connector type, and 4.8V Ni-MH cell configuration. The voltage rail feeding the radio transmitter and speaker amp is identical across both variants, so a single battery pack covers both.
• Bench tested on actual hardware: We cycled this pack through charge and discharge on the CP200 parent unit. The protection circuit held stable through repeated charge cycles, and the unit maintained its wireless link to the nursery unit throughout testing without dropping audio.
• Wireless re-pair after battery swap: The CP200 parent unit loses its stored link to the nursery unit when power is fully interrupted. After fitting this battery, press and hold the pair button on both units until the sync indicator confirms a new connection — do not skip this step.

Parent unit battery draining overnight with the screen left on

The CP200 parent unit draws significantly more current when the LCD backlight stays active through the night. The screen and radio transmitter running together create a sustained load that a depleted or aged Ni-MH cell cannot sustain until morning. Enable the screen timeout in the monitor settings so the display shuts off after inactivity while audio monitoring stays active. This single change reduces overnight current draw considerably without interrupting the audio link.

Night vision drops out or appears dim after fitting a new battery

The nursery unit's IR LEDs need the parent unit to be communicating at full radio power to trigger the night vision mode correctly — and radio output is voltage-sensitive. If this battery has not been fully charged before first use, the voltage presented to the radio circuit sits below its operating threshold. The result looks like a camera fault, but it is a supply voltage issue. Charge the parent unit fully on mains power before the first overnight session; IR performance restores once the cell reaches its rated voltage.