Plantronics 212366-01 Savi 7200 Office Battery 3.7V 240mAh

Plantronics Savi 7200 Office Series — 3.7V Li-Polymer Replacement Battery (212366-01)

This 3.7V, 240mAh lithium-polymer cell replaces the original battery in Plantronics Savi 7200 Office, Savi 7210 Office, Savi 7220 Office, and Savi 7300 wireless headsets. It matches the OEM dimensions at 36.10 x 20.20 x 4.00mm, fitting the headset housing without modification. Capacity is 0.89Wh — identical to the original specification.

• Savi 7200 and 7300 series compatibility: These models share the same battery bay geometry, connector pinout, and BMS handshake protocol. The DECT radio and audio codec draw from the same cell, so voltage tolerance across the discharge curve is tight — this replacement cell meets those tolerances.
• Bench tested on actual hardware: We cycled this cell through the Savi 7200 base station and confirmed BMS initialisation completed without error. The protection circuit responded correctly to charge termination at 4.2V and triggered undervoltage cutoff at the correct low-end threshold.
• First charge in the base station: Seat the headset in the base and let it complete a full charge cycle before taking a call. The base station logs the new cell during that first cycle, which is what the talk-time gauge reads from — skip it and the estimate will be wrong for the first several uses.

Why the Savi 7200 cuts out mid-call even with a charged battery

The Savi 7200 runs its DECT radio and audio processing simultaneously from a 240mAh cell. During a call, combined current draw spikes above the steady-state idle draw. If the cell has aged or was stored at low voltage, internal resistance rises and the voltage sags under that peak draw. The BMS reads that sag as an undervoltage event and cuts power to protect the cell — the headset drops the call. A fresh cell with low internal resistance holds voltage through those draw spikes without triggering the cutoff.

Base station shows full charge but headset dies quickly after swap

A new Li-Polymer cell ships at storage voltage — typically 3.6–3.8V — not at full charge. When you seat it in the base, the charge indicator can flip to green before a true full-charge cycle completes, especially if the base detects voltage above its low-threshold trigger and stops early. The cell is not fully charged at that point. Place the headset back in the base for a complete uninterrupted charge cycle, confirm the indicator runs through its full charge sequence, and the talk-time reading will stabilise after three to five cycles.