About this replacement
Philips DECT 211 / DECT 215 Series — 2.4V Ni-MH Replacement Battery (2HR-AAAU)
This is a 2.4V, 700mAh Ni-MH replacement battery for the Philips DECT 211 cordless phone handset and compatible DECT 215, DECT 215 Trio, and DECT 216 models. It fits inside the handset battery compartment and recharges through the standard base station cradle. OEM part numbers covered include 2HR-AAAU, H-AAA600X2, and 60AAAH2BMX.
- DECT 211 / 215 series compatibility: These handsets share the same 2.4V two-cell Ni-MH battery format and identical compartment dimensions (45.00 × 20.50 × 10.50mm), so one battery fits across the range without any modification.
- Bench tested on actual hardware: We cycled this pack through charge and discharge on a DECT handset platform. The cells accepted a full charge from the base station cradle without triggering any charging fault, and voltage held steady through both talk and standby draw.
- First-charge protocol for NiMH cordless handsets: After installing the battery, place the handset in the base and leave it for a full 16 hours before first use. Ni-MH cells arrive partially discharged from storage and need a slow initial charge to reach rated capacity — skipping this step is the most common cause of short talk time complaints on new batteries.
Range dropping after a battery swap on DECT 211 handsets
DECT handsets regulate transmit power based on available voltage. When a fresh Ni-MH pack hasn't completed its first full conditioning cycle, cell voltage sags faster under the RF transmit load than it would at rated capacity. The radio backs off power to compensate, which shortens usable range noticeably. Running three to five full charge-discharge cycles through the base station brings the cells to full capacity and resolves the voltage sag.
Base station showing no charge or error light after battery replacement
Ni-MH batteries stored for extended periods can drop below the voltage threshold the base station uses to confirm a valid pack is seated — typically below 2.0V for a two-cell pack. When voltage is that low, some base stations refuse to initiate the charge cycle and show an error or no indicator at all. A brief charge from a compatible external NiMH charger at a low rate (around 70mA) for 15–20 minutes is usually enough to bring the pack above the acceptance threshold, after which the base station will take over and charge normally.