Philips SBC-EB4870 Replacement Battery 4.8V 700mAh

Philips SBC-EB4870 / SBC-EB4880 — 4.8V Ni-MH Replacement Battery (MT700D04C051)

This is a 4.8V, 700mAh Ni-MH replacement battery for the Philips SBC-EB4870 and SBC-EB4880 baby monitor parent units. It fits the A1706 and E2005 hardware revisions of the SBC-EB4870, and the A1706 revision of the SBC-EB4880. When the original battery no longer holds a charge, this cell restores portable operation to the parent handset.

• SBC-EB4870 and SBC-EB4880 compatibility: Both the EB4870 and EB4880 parent units share the same 4.8V Ni-MH cell format and connector pinout. The MT700D04C051 part number covers both lines, so one cell fits either handset without modification.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge on the SBC-EB4870 parent unit. The internal protection circuit responded correctly to end-of-charge voltage and the handset showed a full charge indicator within expected charge time.
• Re-pair the handset after every battery swap: The SBC-EB4870 and SBC-EB4880 parent units lose their wireless link to the nursery unit when power is interrupted completely. After fitting this battery, power on the parent unit and run the pairing sequence before relying on the monitor overnight.

Parent unit not connecting to the camera unit after battery swap

Philips SBC-EB48xx parent units store their wireless pairing data in volatile memory. A full power-down — which happens every time the battery is removed — clears that link. Fitting a new battery does not restore the pairing automatically. Power on the parent unit, press and hold the pairing button on the nursery unit until the link indicator confirms connection, then verify the video or audio feed before placing the handset in use.

Night vision dropping out on a freshly charged parent unit

The IR LED array in the nursery unit draws a sustained current during low-light operation. If the parent unit battery is only partially charged, the voltage rail can sag just enough to trigger the handset's low-battery warning and reduce IR output. Charge the parent unit fully before the first overnight session — Ni-MH cells need a complete charge cycle to reach rated capacity from a storage state. A full charge should bring the cell to approximately 5.6V open-circuit before the handset begins regulating it down to operating voltage.