Plantronics Savi W8220 Replacement Battery 3.7V 480mAh

Plantronics Savi W8220 / Savi 8220 / B8200 — 3.7V Li-Polymer Replacement Battery (213199-01)

This 3.7V, 480mAh Li-Polymer cell replaces the internal battery in the Plantronics Savi W8220, Savi 8220, and B8200 wireless DECT headsets. It matches OEM part numbers 213199-01, 203055-01, 203035-01, 208769-02, 208769-01, and 203035-11. Swap it when the original cell no longer sustains a full day of office calls.

• Savi W8220, Savi 8220, and B8200 compatibility: These three models share the same battery bay dimensions, connector pin-out, and BMS handshake protocol, so one cell covers all three. The 3.7V nominal rail and 29.50 × 24.10 × 7.60mm footprint are the binding specs — not just the OEM part number.
• Bench tested on actual hardware: We cycled this cell through the Savi base station and confirmed the BMS completed its handshake without a charging error. The protection circuit responded correctly to both the combined DECT radio and audio draw and to a full charge-termination sequence.
• First-cycle base station protocol: Seat the headset in the base station and let it run a complete charge cycle before taking a call. The base needs that first full cycle to log the new cell and recalibrate the talk-time indicator — pulling the headset early will leave the estimate inaccurate for days.

Base station not recognising new pack after swap

The Savi base station uses a BMS handshake to confirm a valid cell before starting a charge cycle. If the new battery arrives at storage voltage — typically around 3.6V — the base may display a charging error or show no activity at all. This is not a fault with the battery or the base. Remove the headset, reseat it firmly, and confirm the charge LED changes state within 30 seconds. If the error persists, hold the headset in the cradle for 10 minutes to let the BMS draw enough current to register — then the full charge cycle will start normally.

Talk time shorter than rated on first few charges

Li-Polymer cells fresh from storage do not deliver full capacity on the first cycle. The Savi W8220 combines a continuous DECT radio load with the audio codec, so any capacity shortfall shows up quickly in real use. Capacity builds progressively over three to five full charge-discharge cycles as the cell's electrolyte fully activates. Run three complete cycles — charge to full, use until the low-battery tone sounds, return to base — and rated capacity will stabilise.