VXi BlueParrot V100 Replacement Battery 3.7V 180mAh Li-Polymer

Vxi BlueParrot V100 Wireless / B250-XT — 3.7V Li-Polymer Replacement Battery (89-1343-00-00)

This is a 3.7V, 180mAh Li-Polymer battery for the Vxi BlueParrot V100 Wireless, V100, V150, and B250-XT DECT headsets. It slots into headsets used in call centre and office environments where hands-free calling runs all day. Capacity matches the original spec from the product data — 0.67Wh total energy.

• V100 / B250-XT platform fit: These models share the same 3.7V Li-Polymer cell format, connector pinout, and BMS handshake protocol — which is why one part number covers the whole group. Swapping between variants in this family does not require any firmware or pairing change.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the V100 platform. The BMS accepted the new cell without triggering low-voltage lockout, and charge termination fired correctly at full capacity without overcharge events.
• First-charge protocol for Li-Polymer DECT cells: Place the headset on its base or charging cradle immediately after fitting this battery. Let it charge uninterrupted to 100% before first use — Li-Polymer cells at minimum storage voltage can trip the BMS protection circuit if you try to use the headset before the cell reaches its operating voltage floor of 3.0V.

Why the V100 loses DECT range after a battery swap

DECT transmit power on the V100 is tied directly to supply voltage from the cell. A new Li-Polymer battery at partial charge — or a degraded old cell — sags under the RF transmit load, dropping voltage below the headset's stable transmission threshold. This causes the radio to reduce output power to protect the circuit, which cuts usable range. The fix is straightforward: charge the replacement cell fully before testing range. A cell reading 4.1–4.2V at rest will hold voltage under RF load far better than one at 3.6V.

Headset not pairing with base after battery replacement

Some DECT headsets store pairing data in volatile memory that resets when power is fully removed — which happens the moment you pull the old battery. If the V100 or B250-XT won't reconnect to its base after a swap, the headset has lost its DECT registration. Re-pair the headset through the base station's pairing mode: hold the page or pairing button on the base until the indicator flashes, then trigger pairing from the headset within 60 seconds. Once paired, the new cell will hold the registration through normal power cycles.