Philips SN-S150 Baby Monitor Replacement Battery 3.7V 1100mAh

Philips SCD-603/00 Parent Unit — 3.7V Li-ion Replacement Battery (SN-S150)

This 3.7V 1100mAh Li-ion battery fits the Philips SCD-603/00 baby monitor parent unit — the handheld receiver parents carry around the home. It replaces part number SN-S150 and also fits the SCD603, SCD-603H, and SCD603/10. When the original battery swells, stops holding charge, or dies mid-shift, this is the direct swap.

• SCD-603 series compatibility: The SCD-603/00, SCD603, SCD-603H, and SCD603/10 all use the same 3.7V battery bay, connector pin-out, and BMS handshake protocol. One battery covers the whole range.
• Bench tested on actual hardware: We ran this battery in an SCD-603 parent unit and confirmed the BMS accepted the charge cycle without fault flags. The unit powered on and held a stable voltage through standby and active audio monitoring.
• Wireless re-pair after swap: The SCD-603 parent unit loses its stored camera link when power is interrupted completely. After fitting this battery, hold the pairing button on the parent unit for three seconds, then trigger pairing on the camera base — the link re-establishes in under a minute.

Parent unit battery draining overnight on the SCD-603

The SCD-603 parent unit runs the screen, speaker, and 2.4GHz radio simultaneously during night-time monitoring. That sustained draw pulls the 1100mAh cell down faster than most users expect. The screen backlight alone accounts for a significant share of that load. Enabling the screen timeout in the display settings cuts the draw substantially and extends the time between charges.

Night vision stops working after battery replacement on the SCD-603

The infrared LEDs in the camera base require the parent unit to maintain a stable radio link — that link is voltage-sensitive on the parent unit side. If the replacement battery ships at storage charge (typically around 3.5V), the radio output drops and the camera can drop into a low-power state that disables IR. Charge the parent unit fully to 4.2V before first use. Night vision should restore as soon as the unit holds a full charge.