Poly BP1709/A Cordless Phone Compatible Battery 3.7V 1200mAh

Poly Rove 30 / Rove 40 / 2200-86810-001 — 3.7V Li-ion Replacement Battery (BP1709/A)

This is a 3.7V, 1200mAh Li-ion replacement battery for the Poly Rove 30, Rove 40, and 2200-86810-001 wireless DECT handsets. It replaces OEM part BP1709/A and restores power to handsets that no longer hold a charge. The cell measures 53.00 × 34.00 × 5.70mm — a direct physical match for the original battery compartment.

• Rove 30 and Rove 40 compatibility: Both handsets share the same 3.7V single-cell Li-ion pack, connector pinout, and BMS handshake protocol — that is why one part number covers both models.
• Bench tested on actual hardware: We cycled this pack on the Rove 40 handset and confirmed the base station accepted the charging handshake immediately, with the BMS holding voltage steady across standby and active call load.
• First charge after installation: Place the handset in the base and leave it undisturbed for a full charge cycle before use — the Rove series base detects cell voltage and adjusts charge rate accordingly, so interrupting that first cycle can cause the base to underestimate capacity on subsequent charges.

Talk time shorter than expected on the Rove 30 and Rove 40 after a battery swap

Li-ion cells ship in a partial state of charge for transport safety. When the Rove base station first sees a new cell, it calibrates its fuel gauge against the incoming voltage — if that voltage is low, the gauge under-reports capacity and cuts off early. Running two or three full charge-and-use cycles resets the calibration. After that, the handset should reflect the full 1200mAh rating.

Rove handset loses DECT pairing after battery replacement

Removing the battery from a Rove handset cuts all power to the DECT module, which can clear the stored base station registration in some firmware versions. The fix is straightforward: place the handset back in the base, press and hold the registration button on the base unit until the handset re-registers — the process takes under 60 seconds. If the handset still shows no link, confirm the battery is seated firmly and reading above 3.5V before attempting re-registration.