About this replacement
Nortel C3050 / C3060 — 3.6V Ni-MH Replacement Battery (NTHH04GA)
This is a 3.6V 700mAh Ni-MH battery for the Nortel C3050 and C3060 cordless DECT handsets. It replaces OEM part numbers NTHH04GA and A0757132. The battery slots into the handset and restores talk time and standby function when the original pack no longer holds a charge.
- C3050 and C3060 compatibility: Both models share the same handset chassis, battery bay dimensions, and 3.6V NiMH voltage rail. One pack covers both. The connector orientation and BMS contact points are identical across the C3050, C3060, A0628271, and A0667371 handsets.
- Bench tested on actual hardware: We cycled this pack through charge and discharge on the C3050 base station. The base accepted the NiMH voltage profile without error, and the BMS held within the expected charge termination window across repeated cycles.
- First charge on the C3050 base: After installing, seat the handset in the base for a full 16 hours before use. NiMH cells in cordless phone packs need a slow first charge to reach rated capacity — skipping this shortens the usable charge from day one.
Range dropping on the C3050 after a battery swap
Cordless DECT handsets pull extra current during RF transmission. A NiMH pack that hasn't been conditioned will sag in voltage under that load, which causes the transmit circuit to throttle back. The result is reduced range — not a pairing fault or base station issue. Run three to five full charge and discharge cycles on the base, and the cells will stabilise at their rated 3.6V under RF load.
Base station shows no charge light after fitting a new pack
A NiMH battery that sat in storage drops below the voltage threshold the C3050 base station uses to detect a valid pack. When the base sees a voltage below roughly 3.0V, it won't initiate a charge cycle and shows no light or an error state. Place the handset in the base for at least 30 minutes — the trickle stage will bring the cells up above the acceptance threshold. Once the base registers the pack, the charge indicator will activate and the full charge cycle will begin.