TeXet TX-D7950 Cordless Phone Replacement Battery 3.7V 500mAh

TeXet TX-D7950 — 3.7V Li-ion Replacement Battery (DLP413239)

This is a 3.7V, 500mAh Li-ion replacement battery for the TeXet TX-D7950 cordless DECT handset. It slots into the handset battery compartment and restores power to the phone. Voltage and capacity match the original DLP413239 specification exactly.

• TX-D7950 handset fit: The TX-D7950 uses a slim single-cell Li-ion pack at 3.7V nominal. The DLP413239 footprint — 40.25 × 31.92 × 4.32mm — matches the original cavity dimensions, so the connector seats without forcing.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the TX-D7950 base station. The BMS accepted charge from cold storage, balanced correctly at full voltage, and cut off cleanly at the low-voltage threshold without tripping a fault state.
• First charge on the TX-D7950 base: After installing this battery, seat the handset in the base cradle and leave it for a full 16 hours before first use. Li-ion cells in low-draw DECT handsets ship at partial state of charge — a slow first charge from the base lets the cell reach rated capacity properly.

Talk time shorter than expected after fitting the new battery

A fresh Li-ion cell often delivers slightly below rated capacity for the first two to three cycles. This happens because the cell's electrolyte hasn't fully wetted the electrode stack yet. Run the handset through three complete charge and discharge cycles on the base station. By the fourth cycle, the cell typically stabilises at its rated 500mAh output.

TX-D7950 handset losing pairing with base station after battery swap

Removing the battery cuts all power to the handset, including the volatile memory holding the DECT pairing record. Some TX-D7950 units drop the base registration when power is fully interrupted. To re-pair, press and hold the paging button on the base unit until the base enters registration mode, then follow the handset pairing sequence from the menu. The process takes under two minutes and does not affect call logs stored on the base.