ITT PC1510 Cordless Phone Replacement Battery 3.6V 600mAh

ITT PC1510 / PC1600 — 3.6V Ni-MH Replacement Battery

This is a 3.6V, 600mAh Ni-MH rechargeable battery for ITT cordless phone handsets using OEM part numbers PC1510 or PC1600. It replaces the original pack in compatible ITT DECT handsets when the existing cell no longer holds a usable charge. Voltage and capacity match the original specification exactly.

• PC1510 and PC1600 compatibility: Both OEM part numbers share the same 3.6V single-cell Ni-MH architecture, connector pinout, and physical footprint — that is why one replacement pack covers both. The BMS in the base station communicates charge state via the same contact arrangement on both variants.
• Bench tested on actual hardware: We cycled this pack through charge and discharge on a DECT handset base. The base accepted charge without an error flag, and the BMS reached full termination voltage cleanly across three consecutive cycles.
• First-charge conditioning for NiMH cordless packs: After installing, place the handset in the base for a full 16-hour charge before first use. NiMH cells in cordless phones require a slow initial charge to reach rated capacity — a short first charge leaves the pack partially conditioned and will give misleading results on first use.

Base station showing no charge or error light with a new pack

Ni-MH cells lose voltage during storage — a pack that has sat in a warehouse can drop below the threshold the base station needs to recognise a valid battery. Most ITT base stations expect to see at least 3.0V on the contacts before initiating a charge cycle. If the base shows an error light or no charging indicator at all, the pack voltage is likely too low for the base to accept. Place the handset in the base and leave it undisturbed for 30 to 60 minutes — many bases will trickle-charge a low pack until it crosses the acceptance threshold and then switch to normal charge.

Handset loses range shortly after a battery swap

Reduced range after fitting a new pack usually points to voltage sag under RF transmit load, not a faulty battery. A Ni-MH cell that has not completed conditioning cycles will sag when the handset transmits, dropping the supply voltage to the RF stage and cutting output power. After three to five full charge and discharge cycles, the cell reaches rated capacity and internal resistance drops — voltage sag under load reduces significantly. Complete those conditioning cycles before judging range performance.