Philips Avent SCD510/75 Replacement Battery 2.4V 700mAh

Philips Avent SCD510/75 Series — 2.4V Ni-MH Replacement Battery (BY1146)

This is a 2.4V, 700mAh Ni-MH replacement battery for the parent unit of the Philips Avent SCD510/75 digital baby monitor. It also fits the SCD520/60, SCD525/00, and SCD525/97 parent units. OEM part numbers BY1146, CRP395, and CRP395/01 all cross-reference to this cell.

• SCD510/75, SCD520/60, and SCD525 compatibility: These parent units share the same 2.4V single-cell Ni-MH bay, connector orientation, and BMS charge profile. One battery services all of them without modification.
• Bench tested on actual hardware: We ran this cell through charge cycling on an SCD520/60 parent unit. The onboard charge controller accepted the battery immediately, completed a full charge cycle without fault, and the unit held video link throughout the test session.
• Re-pair the parent unit after swap: Baby monitors lose their stored wireless link when the parent unit drops to zero voltage. After fitting this battery, charge the parent unit fully, then hold the pairing button on both the parent unit and camera unit until the link indicator confirms connection.

Parent unit battery draining overnight during normal use

Leaving the parent unit screen on all night is a sustained draw that a degraded original battery cannot sustain — but a new cell needs to be conditioned first. Ni-MH cells straight out of storage often ship at partial charge, so the first full charge cycle matters. Enable the screen timeout in the monitor settings to reduce sustained current draw during night hours. A fully charged fresh cell will handle overnight standby audio monitoring without screen-on drain.

Night vision drops out immediately after battery replacement

The IR LED array in the camera unit draws a short burst of current when night vision activates. This does not drain the parent unit battery — the camera has its own power supply. If night vision is absent after a parent unit battery swap, the cause is a broken wireless link, not the battery voltage. Re-pair the parent and camera units, then confirm the room is dark enough to trigger the IR threshold. Night vision activates automatically below approximately 1 lux.