Auerswald Comfort DECT 800 Replacement Battery 3.6V 700mAh

Auerswald Comfort DECT 800 — 3.6V Ni-MH Replacement Battery

This is a 3.6V, 700mAh Ni-MH replacement battery for the Auerswald Comfort DECT 800 cordless handset. It fits directly into the handset battery compartment and restores cordless operation when the original cell has lost capacity or failed. Dimensions are 46.30 x 32.00 x 10.50mm — confirm against your existing pack before ordering.

• Comfort DECT 800 handset fit: The Comfort DECT 800 uses a single Ni-MH cell at 3.6V to power its DECT radio and audio circuit. This pack matches that voltage rail and physical form factor, including the contact orientation the handset expects.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on DECT-class handset loads. The BMS held stable across the full discharge curve, and the cell accepted charge current without thermal runaway or voltage spike at the termination point.
• First-charge protocol for Ni-MH handsets: After installing, seat the handset in the base station and leave it for a full 16 hours before first use. Ni-MH cells shipped in partial state need a slow, complete first charge to reach rated capacity — skipping this shortens usable talk time from the start.

Talk time shorter than original battery after replacement

Ni-MH cells do not deliver rated capacity on the first cycle — they typically need three to five full charge-discharge cycles before the electrodes reach full chemical activity. If your Comfort DECT 800 feels like it runs out faster than the original, this is expected behaviour, not a fault. Each full cycle adds recoverable capacity. By cycle four or five, talk time should stabilise close to the 700mAh rated figure. Run the handset until it drops out, then return it to the base for a full 16-hour charge — repeat three times.

Base station shows no charge light or error after battery swap

Ni-MH packs lose voltage during storage — if the cell voltage drops too low, the Comfort DECT 800 base station may not recognise it as a chargeable pack and will show no charge indicator or flag an error. The base is looking for a minimum voltage before it initiates the charge cycle. Remove the handset, wait 30 seconds, and reseat it firmly — this resets the charge detection circuit. If the base still shows no activity after five minutes, the pack voltage is likely below the acceptance threshold; place the handset on the base for at least 30 minutes undisturbed to allow trickle current to bring the cell up to a recognisable voltage level.