OKAYO Digital Pendant AHB623450PJT Compatible Battery 3.7V 1100mAh

OKAYO Digital Pendant Transmitter LBT-1200 — 3.7V Li-Polymer Replacement Battery (AHB623450PJT)

This is a 3.7V, 1100mAh Li-Polymer cell built to the AHB623450PJT specification. It fits the OKAYO Digital Pendant Transmitter and LBT-1200, used for staff-to-patient and staff-to-guest communication in healthcare and hospitality facilities. Slim at 5.80mm thick, it slots into the pendant housing without modification.

• LBT-1200 and Digital Pendant Transmitter compatibility: Both units share the same 3.7V rail, AHB623450PJT footprint, and BMS handshake protocol — one cell covers both. The connector orientation and PCB contact points are identical across the range.
• Bench tested on actual hardware: We cycled this cell through combined DECT radio and audio draw on the LBT-1200. The BMS held charge cutoff cleanly and showed no voltage sag under sustained transmission load.
• First-cycle protocol for the LBT-1200: Seat the pendant in its base station and run a full charge cycle before taking any calls. The base station logs the new cell during that first cycle — until it does, the talk-time indicator reads from stale data and will not display accurately.

Base station not recognising a freshly installed cell

The LBT-1200 base uses a BMS handshake to register a new pack before it begins managed charging. If the cell ships at storage voltage — typically around 3.6V — the base may flag a charge error or show no activity at all. This is not a fault with the cell or the base. Seat the pendant, leave it undisturbed for a full charge cycle, and the handshake completes. If the error persists after one full cycle, reseat the battery connector and confirm the contacts are clean.

Pendant cuts out mid-transmission on a charged battery

The pendant transmitter draws simultaneously from the audio circuit and the DECT radio during active calls. That combined load creates a brief current spike that can trip the BMS undervoltage cutoff if the cell voltage dips below the protection threshold — usually 3.0V. A cell that reads fully charged at rest may still sag under this dual draw if it has not completed conditioning cycles. Run three to five full charge-discharge cycles through the base station and the sag reduces as internal resistance drops. If cut-outs continue past five cycles, check that the cell resting voltage returns to at least 4.1V after a full charge.