Samsung CLA985 Cordless Phone Compatible Battery 3.6V 1200mAh

Samsung CLA985 / CLT985 Series — 3.6V Ni-MH 1200mAh Replacement Battery

This is a 3.6V, 1200mAh Ni-MH rechargeable battery for Samsung cordless phone handsets including the CLA985, CLT980, CLT982E, and CLT985. It replaces the original internal pack when talk time has dropped or the handset no longer holds a charge. Dimensions are 42.40 × 49.90 × 14.40mm — measure your existing pack before ordering if you are unsure.

• CLA985 / CLT980 / CLT982E / CLT985 compatibility: These handsets share the same battery bay dimensions and 3.6V charging circuit. The base station delivers charge via the same contact rail across the series, so one battery format covers all listed models.
• Bench tested on actual hardware: We cycled this pack through charge and discharge on a cordless phone bench rig. The NiMH cells accepted charge correctly from the base station contact rail, and BMS behaviour remained stable across multiple cycles with no unexpected cutoffs.
• First-charge protocol for NiMH cordless packs: After installing, seat the handset in the base and leave it for a full 16 hours before first use. NiMH cells in cordless phones need that slow initial charge to reach rated capacity — skipping it means the first several cycles will deliver noticeably less talk time than the battery is actually capable of.

Base station showing a charging error or refusing to charge a new NiMH pack

Samsung cordless bases use a voltage-sensing handshake to confirm a battery is present and within an acceptable range before starting the charge cycle. A new NiMH pack sitting in a warehouse can self-discharge to a point where the base registers the voltage as too low and flags a fault rather than charging. This is not a base station fault or a defective battery. Place the handset in the base and leave it undisturbed — most bases will begin trickle charging once the pack voltage climbs above approximately 3.0V, after which normal charging resumes automatically.

Range drops noticeably once the battery is below half charge

DECT handsets draw a short burst of higher current each time the RF transmitter fires during a call. When a NiMH pack's state of charge drops, its internal resistance rises and voltage sags under that transmit load. The handset's RF output tracks available voltage, so lower voltage means reduced transmit power and a shorter effective range. If range is dropping mid-call, return the handset to the base for a full charge cycle — after 3 to 5 full conditioning cycles, the pack reaches rated capacity and voltage sag under RF load reduces significantly.