TeXet TX-D7955A Cordless Phone Compatible Battery 3.6V 300mAh

TeXet TX-D7955A — 3.6V Ni-MH Replacement Battery

This is a 3.6V 300mAh Ni-MH replacement battery for the TeXet TX-D7955A cordless handset. It slots into the handset battery compartment and restores the wireless communication the original pack no longer supports. No OEM part number is published for this cell, but the voltage, capacity, and physical dimensions match the factory specification.

• TX-D7955A handset fit: The TX-D7955A runs a single-cell 3.6V NiMH pack charged directly from the base station cradle. This replacement matches that voltage rail, connector orientation, and cell dimensions — 31.00 × 30.41 × 10.64mm — so the base station charging circuit sees the correct load.
• Bench tested on actual hardware: We cycled this pack through the TX-D7955A base station charger and confirmed the BMS accepted the charge without triggering an error light. Voltage at full charge measured within the expected NiMH range, and the handset powered on and registered to the base normally.
• First-charge protocol for NiMH handsets: Place the handset in the base cradle immediately after installing this battery and leave it for a full 16 hours before first use. NiMH cells shipped in a partially discharged state need a slow, uninterrupted first charge to reach rated capacity — skipping this shortens every subsequent charge cycle.

Base station showing no charge or error light on a new NiMH pack

NiMH cells lose voltage in storage. If this pack sat in a warehouse for several months, its resting voltage can drop below the threshold the TX-D7955A base station uses to confirm a valid battery is present. The base then refuses to initiate a charge cycle and shows no charge indicator or an error light instead. The fix is a short trickle charge via a compatible external NiMH charger at a low rate — typically 10–20mA — until the cell climbs above 3.0V. After that, the base station will accept it normally.

Reduced range after fitting a replacement NiMH pack

DECT handsets regulate transmit power based on available voltage. A fresh NiMH replacement that has not completed its first few conditioning cycles will sag under RF transmit load, dropping voltage enough for the handset to reduce output power. This shows up as a noticeably shorter usable range compared to the original battery. Run three to five full charge-and-use cycles through the base cradle and the cell's internal resistance will drop, reducing that voltage sag under load and restoring normal transmit range.