Xact B655 Cordless Phone Replacement Battery 3.6V 700mAh

Xact B655 / EXG2801 / XG2155 / XG2200 — 3.6V Ni-MH Replacement Battery

This is a 3.6V, 700mAh nickel-metal hydride battery for Xact cordless phone handsets including the B655, EXG2801, XG2155, and XG2200 series. It replaces the original pack when the handset stops holding a charge or won't leave the base. Dimensions are 45.60 × 31.30 × 10.60mm — verify against your existing pack before fitting.

• Shared pack across Xact handset models: The B655, EXG2801, XG2155, and XG2200 all draw from the same 3.6V single-cell NiMH architecture with an identical connector pitch. One battery format covers the full range.
• Bench tested on actual hardware: We cycled this pack on a DECT handset test rig. The NiMH cell accepted charge from a standard base station without triggering a charge-fault condition, and voltage held steady across the RF transmit window.
• First charge protocol for NiMH cordless packs: After fitting, seat the handset in the base and leave it for a full 16 hours before first use. NiMH cells in cordless phones need a slow initial charge to reach rated capacity — a short first charge will leave you with noticeably reduced talk time from day one.

Base station showing a charging error light after fitting a new NiMH pack

DECT base stations read battery voltage before committing to a charge cycle. A NiMH pack that has sat in storage can drop below 3.0V, which some bases flag as a fault rather than a flat battery. The base isn't broken — it's rejecting a pack it reads as outside its acceptance window. Place the handset in the base, wait 30 seconds, remove it, and re-seat it firmly. If the error clears, the base has accepted the cell; if not, check resting voltage with a multimeter — it should read at least 3.0V before the base will engage a charge cycle.

Range drops noticeably mid-call after a battery swap

NiMH cells show a voltage sag under the RF transmit load of a DECT handset — this is most pronounced when the battery hasn't completed its first full conditioning cycle. The handset's transmit power follows available voltage, so a sagging cell means reduced signal reach before any visible low-battery indicator appears. Run three to five full charge-and-use cycles to allow the cell to reach rated capacity. After conditioning, resting voltage between calls should sit at approximately 4.0V for a freshly charged 3.6V NiMH pack.