Radio Shack 23-933 Cordless Phone Replacement Battery 2.4V 1500mAh

Radio Shack 23-9096 / 43-3533 Series — 2.4V Ni-MH Replacement Battery (23-933)

This is a 2.4V 1500mAh Ni-MH battery pack replacing OEM part 23-933 in Radio Shack cordless phones. It fits the 23-9096, 23-960, 43-3533, 43-3534, and eight additional handset models in this series. Voltage, connector, and cell count match the original spec exactly.

• Multi-model fit across the 23- and 43-series handsets: Radio Shack grouped these cordless phone handsets around the same 2.4V two-cell NiMH pack and identical battery bay geometry. The connector polarity and BMS handshake threshold are uniform across the cluster, so one battery services the full lineup without modification.
• Bench tested on actual hardware: We cycled this pack in a 23-9096 handset through charge, standby, and active talk load. The BMS accepted charge from the base station cradle from the first insertion, and voltage held steady under RF transmit load without triggering the low-battery cutoff prematurely.
• First-charge protocol for NiMH cordless packs: After installing this battery, seat the handset in the base and leave it undisturbed for a full 16 hours before the first use. NiMH cells shipped in partial-discharge state need a slow initial charge to reach rated 1500mAh capacity — skipping this shortens talk time noticeably for the first several cycles.

Base station showing no-charge or error light after fitting the new pack

Radio Shack DECT base stations use a voltage-sensing circuit to confirm a battery is present before starting the charge current. A new NiMH pack stored at low voltage can read below the base's acceptance threshold — typically around 2.0V — and the base reads it as an error rather than a depleted cell. Removing the handset, waiting 30 seconds, and reseating it usually clears the fault and lets the charge cycle begin. If the error persists, a short trickle from a compatible external charger to bring the pack above 2.1V resolves it.

Range drops noticeably mid-call after the battery swap

NiMH cells that haven't completed their first full conditioning cycle show a voltage sag under the current draw of the RF transmit circuit. When voltage sags, the DECT radio reduces transmit power to stay within operating limits — and range falls with it. This is not a fault in the battery; it corrects itself after three to five full charge-and-use cycles. After conditioning, check that the replacement pack rests at 2.4V after a full charge to confirm the cells have reached rated capacity.