Beaba Babyphone Audio Simply Zen+ Replacement Battery 3.7V 1400mAh

Beaba Babyphone Audio Simply Zen+ — 3.7V Li-ion Replacement Battery

This is a 3.7V, 1400mAh Li-ion replacement battery for the Beaba Babyphone Audio Simply Zen+ parent unit. It fits the portable handset that parents carry around the home while the base unit stays in the nursery. Swapping this battery restores the parent unit's wireless, cord-free operation when the original cell no longer holds a charge.

• Babyphone Audio Simply Zen+ parent unit fit: The Zen+ parent unit runs on a single-cell 3.7V Li-ion pack at this form factor. The BMS in the handset expects a cell within that voltage window — cells outside spec trigger a low-battery shutdown before the pack is actually depleted.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the bench, confirmed BMS handshake with the parent unit, and verified the protection circuit trips correctly at the low-voltage cutoff threshold without false shutdowns mid-session.
• Post-swap re-pair reminder: When the parent unit loses power completely during a battery swap, it drops its wireless link to the nursery base unit. After fitting this battery, hold the pairing button on both units until the link indicator confirms re-connection before leaving the nursery unattended.

Parent unit range reduced after battery swap

The Zen+ parent unit's radio transmitter draws from the same cell that powers the display and speaker. At low state of charge, the transmitter runs below its rated power level, which shortens the effective range between parent unit and base. A freshly installed battery at partial charge will show this symptom even though the unit powers on normally. Charge the replacement cell to 4.2V before the first use session to restore full radio output.

Parent unit battery draining overnight with screen on

Leaving the parent unit display active through the night is a sustained draw that a 1400mAh cell was not sized to handle indefinitely. The backlit screen, speaker standby, and radio receiver running together pull significantly more current than audio-only mode. Enable the screen timeout setting in the parent unit menu so the display sleeps while audio monitoring continues. That single change substantially reduces overnight drain without affecting the monitor's core listening function.