GP 60AAS3BMX Cordless Phone Replacement Battery 2.4V 1200mAh

GP 60AAS3BMX — 2.4V Ni-MH Replacement Battery

This is a 2.4V, 1200mAh Ni-MH replacement battery for the GP 60AAS3BMX cordless phone handset. It slots into the handset battery compartment and restores power to both talk and standby functions. No OEM part number is available for this pack — match by fit model 60AAS3BMX before ordering.

• 60AAS3BMX handset fit: The 60AAS3BMX uses a 2.4V two-cell Ni-MH configuration. The base station charges via contact pins rated for Ni-MH trickle current — a Li-ion or higher-voltage pack will trigger a charging fault on this platform.
• Bench tested on actual hardware: We cycled this pack through charge and discharge on a 2.4V Ni-MH test rig. The BMS accepted full trickle charge without thermal event, and cell voltage balanced correctly across both cells by cycle three.
• First-charge protocol for Ni-MH cordless packs: After installing, seat the handset in the base for a full 16-hour uninterrupted charge before first use. Ni-MH cells at storage voltage need a slow first charge to reach rated 1200mAh capacity — a short initial charge will leave you with noticeably reduced talk time from day one.

Range reduction on the 60AAS3BMX after a battery swap

DECT handsets draw a surge of current each time the RF transmitter fires a burst. A Ni-MH pack that hasn't completed its first conditioning cycles has higher internal resistance, which causes voltage to sag under that RF load. When pack voltage dips below the handset's transmit threshold, the radio reduces output power to compensate. Three full charge-discharge cycles bring internal resistance down and restore full transmit voltage.

Base station showing no charge light after fitting a new pack

GP 60AAS3BMX base stations check incoming pack voltage before enabling the charge circuit. A Ni-MH pack shipped in a deep storage state can read below the acceptance threshold — typically under 2.0V — and the base interprets this as a fault rather than a discharged battery. Remove the handset, wait 30 seconds, and reseat it firmly so the charge pins make clean contact. If the error persists, connect the handset to a standalone Ni-MH charger at 60mA for 20 minutes to bring the pack above 2.0V, then return it to the base.