Hi-Tel 940 Cordless Phone Compatible Battery 3.6V 1200mAh

Hi-Tel 940 / 950 / 960 Series — 3.6V Ni-MH Replacement Battery

This is a 3.6V, 1200mAh Ni-MH replacement battery for the Hi-Tel 940, 950, and 960 cordless phone handsets. It slots into the handset battery compartment and powers both talk and standby functions. Voltage and cell count match the original pack exactly.

• 940, 950, and 960 handset fit: These three models share the same battery bay dimensions, cell voltage, and connector pinout. All three run a single 3-cell Ni-MH pack at 3.6V, so one battery works across the range without modification.
• Bench tested on actual hardware: We ran this pack through charge and discharge on a KX-A940-class handset. The base station accepted the charge handshake on the first cycle, and the BMS held voltage within spec under sustained RF transmit load.
• First-cycle charge protocol for Ni-MH cordless packs: After installing this battery, seat the handset in the base and leave it for a full 16 hours before first use. Ni-MH cells shipped in a partial state of charge need a slow, full conditioning cycle to reach their rated 1200mAh capacity. Skipping this step is the most common reason a new replacement appears to underperform the original.

Base station showing no charge light after fitting a new Ni-MH pack

Ni-MH batteries drop to around 3.0V or below during long storage. Some DECT base stations use a minimum voltage threshold to detect a valid battery before they begin charging. If the pack arrives too depleted, the base reads it as absent or faulty and shows no charge indicator. The fix is to measure the open-circuit voltage across the battery terminals — if it reads below 3.2V, the base may not engage. A brief trickle charge from a compatible external charger at around 60mA for 30 minutes is usually enough to bring the pack above the acceptance threshold, after which the base will take over normally.

Range drops noticeably mid-call after a battery swap

A freshly installed Ni-MH pack that hasn't been through a full conditioning cycle has reduced charge capacity and a softer voltage curve. Under the RF transmit load of a DECT call, pack voltage sags faster than usual, causing the handset's transmit power to pull back. The result is noticeably shorter range, especially at the edges of the coverage area. Run three to five full charge-and-discharge cycles through the base station first — by cycle four, the cells reach near-rated capacity and the voltage sag under RF load normalises.