Auerswald COMFORT 3.6V Cordless Phone Replacement Battery 700mAh

Auerswald COMFORT / COMFORT DECT 800 — 3.6V Ni-MH Replacement Battery

This is a 3.6V, 700mAh Ni-MH rechargeable battery for Auerswald COMFORT and COMFORT DECT 800 cordless handsets. It sits inside the handset and powers the DECT radio, display, and keypad. When the original pack degrades, this battery restores normal cordless operation.

• COMFORT and COMFORT DECT 800 fitment: Both models use the same 3.6V single-cell NiMH pack with identical physical dimensions (45.00 × 31.10 × 10.50mm) and the same connector orientation. No modification is needed to fit either handset.
• Bench tested on actual hardware: We cycled this pack through charge and discharge on a NiMH-compatible test rig. The cell accepted a full charge without thermal runaway and held voltage above the DECT radio cutoff threshold through multiple discharge cycles.
• First charge after installation: Place the handset in the base cradle for a full 16 hours before first use. NiMH cells ship in a partially discharged state — a slow initial charge lets the cells balance and reach their rated 700mAh capacity. Skipping this will cut your initial talk time short.

Talk time shorter than expected after the first few charges

NiMH cells in cordless phones need three to five full charge-discharge cycles before they reach rated capacity. A freshly installed pack may feel weaker than the old battery for the first few days — that is normal cell conditioning, not a fault. Each full cycle pushes the cells slightly closer to their 700mAh rating. Run the handset to low battery and return it to the base after each call to accelerate this process.

Base station charge light not activating on a new NiMH pack

NiMH batteries lose charge during storage, and a deeply discharged pack can fall below the voltage threshold the base uses to detect a valid battery. The base interprets a very low cell voltage as an absent or faulty battery and withholds charging current. To recover, connect the handset to the base and leave it undisturbed for at least 30 minutes — most Auerswald bases apply a trickle pre-charge that brings the pack up to acceptance voltage before switching to normal charge. If the charge light still does not activate after 30 minutes, disconnect and reconnect the base power supply to reset the charge controller.