Doro Matra Cordless Phone Replacement Battery 3.6V 700mAh

Doro Matra — 3.6V Ni-MH Replacement Battery

This is a 3.6V, 700mAh Ni-MH battery for the Doro Matra cordless DECT handset. It replaces the original cell pack when the handset no longer holds a charge or stops powering on between calls. Voltage and chemistry match the Matra's charging circuit exactly.

• Doro Matra handset fit: The Matra uses a 3.6V Ni-MH pack with a specific cell footprint — 45 × 36 × 10mm. This battery matches that envelope. The base station's charge circuit is calibrated for Ni-MH at this voltage, so chemistry matters here as much as size.
• Bench tested on actual hardware: We ran this pack through the Matra's base station charge cycle and confirmed the charging circuit accepted the cell without error. The BMS on the base reached trickle-charge phase as expected, indicating correct voltage recognition.
• First charge on the Matra base: After fitting this battery, seat the handset in the base and leave it for a full 16 hours before the first call. Ni-MH cells ship in a partially discharged state. A slow first charge lets the cells reach rated capacity — skipping this step is the most common reason a new battery underperforms from day one.

Range dropping mid-call after fitting a new Ni-MH pack

The Matra's DECT radio draws a surge of current when maintaining signal at the edge of range. A freshly fitted Ni-MH battery that hasn't completed its first conditioning cycle has higher internal resistance than a fully conditioned pack. That resistance causes a voltage sag under RF load, which the handset reads as low battery and responds by reducing transmit power. After three to five full charge and discharge cycles, internal resistance drops and the voltage sag under load shrinks noticeably.

Base station charge light not activating after battery swap

Ni-MH batteries self-discharge during storage, and a deeply discharged pack can sit below the voltage threshold the Matra base uses to start its charge cycle. The base sees an open circuit rather than a battery and does not trigger the charge indicator. Remove the handset, wait 10 seconds, and re-seat it firmly — the contact pins need a clean connection. If the light still does not activate, check the pack voltage with a multimeter; a reading below 3.0V means the cells need a pre-charge boost before the base will accept them.