Bosch Atus DECT 6000 Replacement Battery 3.6V 700mAh

Bosch Atus DECT 6000 / Atus DE1-BX — 3.6V Ni-MH Replacement Battery

This is a 3.6V, 700mAh Ni-MH rechargeable battery for the Bosch Atus DECT 6000 and Atus DE1-BX cordless phone handsets. It replaces the original cell when the handset stops holding charge or drops out of use faster than it used to. Dimensions are 45.00 x 31.10 x 10.50mm — same footprint as the factory pack.

• Atus DECT 6000 and DE1-BX platform fit: Both handset models run the same 3.6V single-cell NiMH configuration with the same connector orientation and contact spacing. One battery SKU covers both without any modification.
• Bench tested on actual hardware: We ran charge and discharge cycles through a base station cradle to confirm the BMS accepted the pack without throwing a charge error. Cell voltage at full charge sat at 1.42V per cell, within spec for NiMH.
• First charge after install: Place the handset in the base cradle immediately after fitting and leave it for a full 16 hours before first use. NiMH cells shipped in storage state need a slow initial charge to reach rated capacity — skipping this step will leave the battery underperforming for weeks.

Talk time shorter than expected after the first few charges

NiMH cells often underdeliver capacity in the first three to five full cycles. This is not a fault — the cell chemistry needs full charge-discharge cycles to reach rated 700mAh capacity. During early cycles, the cells may only deliver 60–75% of rated capacity. Run three complete charge-and-use cycles with the handset, letting the battery deplete through normal calls before returning it to the base each time.

Base station showing a charge error light after battery swap

A new NiMH pack that has sat in storage can arrive at a resting voltage below the threshold the Atus base station uses to confirm a valid battery is seated. The base interprets this low voltage as a fault and refuses to charge. Remove the handset, leave it out of the cradle for 30 seconds, then reseat it firmly. If the error persists, use a USB NiMH trickle charger to bring the cell up to roughly 3.6V before returning it to the base.