Plantronics RIG 700 3.7V Replacement Battery 750mAh

Plantronics RIG 700 Series — 3.7V Li-Polymer Replacement Battery (6254361836)

This is a 3.7V 750mAh Li-Polymer cell for the Plantronics RIG 700 wireless gaming headset family. It fits the RIG 700, RIG 700HD, RIG 700HS, and RIG 700HX. The original part number is 6254361836.

• RIG 700 family fit: All four RIG 700 variants share the same battery bay dimensions, connector pinout, and BMS handshake protocol. Swapping cells across the HD, HS, and HX models works because the firmware reads the same cell chemistry tag — 3.7V Li-Polymer — and applies the same charge curve.
• Bench tested on actual hardware: We ran this cell through the RIG 700's charge controller and confirmed the BMS accepted the pack, completed a full CC/CV cycle, and reported cell status correctly to the headset firmware without throwing a charge fault.
• First charge in the base station: Seat the headset in the charging cradle and let it complete one uninterrupted charge cycle before use. The base station must log the new cell before its talk-time counter resets — skip this step and the on-screen charge indicator will misread the pack for several cycles.

Why the RIG 700 cuts out mid-session on a new battery

The RIG 700 draws from two loads at once — the DECT or USB-C radio module and the audio DSP. On a degraded or storage-discharged cell, combined draw pulls the terminal voltage below the BMS cutoff threshold, tripping a hard shutdown. A new cell at storage voltage (typically 3.6–3.7V) can trigger the same cutoff on the first few uses before the cell has been fully cycled. One complete charge-discharge cycle normalises the usable voltage window and the cutouts stop.

Base station shows charging but headset dies after a few minutes of use

This is a storage-voltage problem, not a faulty cell. A new Li-Polymer pack ships at roughly 50% state of charge, and the base station's charge LED goes green once the cell hits its upper voltage target — which happens quickly from a partial state. The headset then cuts off fast in use because the cell never completed a full cycle. Seat the headset, wait for a full uninterrupted charge, then discharge it fully in use once — after that, the charge indicator and actual capacity will align.