Auerswald Comfort DECT 610 Replacement Battery 3.6V 400mAh

Auerswald Comfort DECT 610 — 3.6V Ni-MH Replacement Battery

This is a 3.6V 400mAh Ni-MH battery for the Auerswald Comfort DECT 610 cordless handset. It slots into the handset battery compartment and powers both active calls and standby mode. Voltage and form factor match the original cell exactly.

• Comfort DECT 610 fit: The 610 uses a compact single-cell Ni-MH pack rated at 3.6V. The physical dimensions — 47.25 × 34.20 × 7.87mm — match the battery bay. No adapter, no modification needed.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the DECT 610 base station. The BMS accepted the pack without error, and charge current behaved normally from the first cycle.
• First-charge protocol for Ni-MH cordless packs: After installing, seat the handset in the base and leave it for a full 16 hours before first use. Ni-MH cells shipped from storage are partially discharged — a slow first charge lets the cells reach rated capacity. Skipping this step causes the first few cycles to read short.

Base station showing no charge or error light on a new Ni-MH pack

Ni-MH batteries lose voltage during storage. If the pack voltage drops far enough, some DECT base stations reject the charge cycle — the charge indicator stays off or flashes an error. This happens because the base's charge controller expects to see a minimum starting voltage before it begins current flow. The fix is a brief trickle charge: place the handset in the base, wait 20–30 minutes, then remove and re-seat it. This nudges the cell above the acceptance threshold, typically around 3.0V, and the base resumes normal charging.

Talk time shorter than the original battery after replacement

A new Ni-MH cell will not deliver full capacity on the first charge cycle — this is normal chemistry behaviour, not a fault. The cells need three to five full charge-discharge cycles to reach rated capacity. Each cycle, you will notice a small improvement. To condition the pack, use the handset until it signals low battery, then return it to the base for a full charge — repeat this three times before judging talk time against the rated figure.