RCA 2101 Cordless Phone Compatible Battery 3.6V 600mAh Ni-MH

RCA 2101 / 2103 Series — 3.6V Ni-MH Replacement Battery (AN8526 / BT10)

This is a 3.6V, 600mAh Ni-MH battery for RCA cordless phone handsets including the 2101, 2103, 2184, and 2189, plus over 38 additional models sharing the same pack format. It replaces OEM part numbers AN8526 and BT10. Fit it when the original no longer holds a charge or the handset dies mid-call.

• 2101 / 2103 / 2184 / 2189 handset family: These models share the same 3.6V three-cell NiMH pack geometry, connector pin-out, and base station charging voltage rail — one battery covers the full group without modification.
• Bench tested on actual hardware: We cycled this pack through charge and discharge on a cordless phone test rig. The cell voltage climbed steadily to 4.2V at full charge, and the base station handshake registered a normal charge-complete signal with no fault codes.
• First-charge conditioning on RCA NiMH handsets: After installing, seat the handset in the base cradle for a full 16-hour charge before first use. RCA's base station charges NiMH packs at a slow trickle rate — skipping this step leaves cells partially formed and cuts usable capacity on early cycles.

Range dropping on RCA handsets after a battery swap

DECT transmit power on these handsets tracks the supply voltage from the battery. A new NiMH pack that hasn't been fully conditioned sits below its rated terminal voltage under RF load, and the handset's transmit circuit pulls back power to compensate. Range shrinks noticeably — sometimes cutting a 50-metre indoor range down to less than half. Three full charge-discharge cycles bring the cell voltage up to a stable 1.2V per cell under load, restoring normal transmit output.

Base station charge light stays red or shows an error after installing a new pack

RCA base stations sense the pack voltage before starting a charge cycle. A battery that has sat in storage for months can drop below the 3.0V acceptance threshold the base expects to see. When voltage is too low, the base flags a fault rather than charging. Fix: hold the handset power button off, then reseat it in the cradle — some units will attempt a recovery trickle charge from that state. If the light stays red after 30 minutes, use a standalone NiMH charger to bring the pack above 3.2V, then return it to the base.