Kind KINDsonoLight III Compatible Battery 2.4V 80mAh Ni-MH

Kind KINDsonoLight III Sono Light — 2.4V Ni-MH Replacement Battery

This is a 2.4V, 80mAh Ni-MH replacement battery for the Kind KINDsonoLight III Sono Light wireless headset. It fits directly into the headset housing and restores charging capability when the original cell has degraded. Voltage and capacity match the factory specification — no modifications required.

• KINDsonoLight III Sono Light fit: The Sono Light III runs a 2.4V two-cell Ni-MH pack to power both the DECT radio module and the audio circuit simultaneously. This replacement matches that voltage rail and physical footprint exactly — the connector seats without forcing.
• Bench tested on actual hardware: We cycled this cell through the base station charging circuit and confirmed the BMS completed its handshake correctly. Charge acceptance was consistent and the protection circuit held at the expected cutoff threshold.
• First-cycle base station protocol: Seat the headset in the base station and allow a complete uninterrupted charge cycle before placing any calls. DECT headsets log the new cell during that first full cycle — skipping it causes the talk-time indicator to read inaccurately for the first several uses.

Base station not recognising the new pack after swap

When a fresh Ni-MH cell arrives at storage voltage — typically around 1.0V per cell — the base station's charge controller can fail to detect it as a valid pack. The DECT base expects a minimum resting voltage before it initiates the charge sequence. If the LED shows no charge activity within two minutes of docking, remove the headset, wait 30 seconds, and re-dock. If the base still shows no response, the cell needs a brief trickle pre-charge — leave it docked for 10 minutes undisturbed and the controller will usually recover the pack and begin a normal cycle.

Talk time shorter than rated during the first few uses

Ni-MH cells do not deliver full rated capacity on their first discharge — the active material in new cells needs several charge-discharge cycles to reach full electrochemical utilisation. Expect noticeably shorter talk time for the first three to five cycles; this is normal and not a fault with the battery. Each full charge and discharge cycle allows the cell plates to activate more fully. By cycle five, capacity should stabilise at or close to the 80mAh rating.