Summer Infant 02170 Parent Unit Replacement Battery H-AAA600 4.8V

Summer Infant 02170 / 02320 Series — 4.8V Ni-MH Replacement Battery (H-AAA600)

This is a 4.8V 700mAh Ni-MH replacement battery for the Summer Infant baby monitor parent unit. It fits the 02170, 02320, and 02174 handsets, along with additional compatible models. The original pack degrades with normal rechargeable cycling — this replaces it at the same voltage and capacity spec.

• 02170 and 02320 parent unit compatibility: These handsets share the same battery footprint, connector orientation, and 4.8V NiMH cell configuration. The BMS on each unit expects the same charge curve, so no firmware or pairing adjustment is needed for the battery itself.
• Bench tested on actual hardware: We ran this pack through charge and discharge cycles on a Summer Infant parent unit. The BMS accepted the cell stack without fault codes, and voltage held steady across the operating range.
• Re-pair after install: Removing the battery completely cuts power to the parent unit's wireless module. After fitting the new pack, press and hold the pair button on both the parent unit and camera unit to re-establish the link — the monitor does not restore this automatically.

Why the parent unit loses range after a battery swap

The radio transmitter in the parent unit is voltage-sensitive. A freshly installed Ni-MH pack starts below full charge, and at low voltage the transmitter runs at reduced power. This shrinks effective range and can cause dropouts in rooms further from the camera unit. Charge the parent unit fully before judging whether range has been restored — 4.8V nominal means the pack needs a complete charge cycle to reach operating voltage across all four cells.

Parent unit screen stays on overnight and battery is flat by morning

The parent unit LCD backlight draws continuous current when left on through the night. A 700mAh Ni-MH pack is not sized for sustained screen-on operation over eight or more hours. The fix is to enable the screen timeout or VOX mode so the display activates only on sound. Check the settings menu for display timeout — setting it to 30 seconds or less significantly reduces overnight drain.