Saramonic WiTalk9 11601 Compatible Battery 3.7V 1600mAh

Saramonic WiTalk9 Intercom Headset — 3.7V Li-Polymer Replacement Battery (WiTalk9 BP)

This 3.7V, 1600mAh Li-Polymer cell replaces the original battery in the Saramonic WiTalk9 wireless intercom headset system, covering model numbers 11601, WiTalk9 Intercom Headset, and WiTalk9 SMH. The pack slots into the headset housing and restores power to both the audio processing and the DECT radio transmitter. Capacity is rated at 5.92Wh at the cell level.

• WiTalk9 platform fit: The 11601, WiTalk9 Intercom Headset, and WiTalk9 SMH all share the same battery bay dimensions and connector pinout. The BMS handshake logic is identical across these variants, so one cell covers the full WiTalk9 lineup without modification.
• Bench tested on actual hardware: We cycled this pack under combined audio and DECT radio draw — the two loads that run simultaneously during an active call. The BMS held stable charge acceptance across multiple cycles with no thermal cutoff events.
• First charge in the base station: Place the headset in the WiTalk9 base station and run one complete charge cycle before taking a call. The base station needs to log the new cell before its talk-time estimate reads accurately — skipping this step causes the indicator to report incorrect remaining charge.

Why the WiTalk9 headset cuts out mid-call on a new battery

The WiTalk9 draws current from two sources simultaneously during a live call: the audio codec and the DECT radio transmitter. On a cell that has not completed its first full cycle, this combined draw can pull the terminal voltage below the BMS protection threshold momentarily, triggering a cutoff. The headset drops the call and may appear to power off briefly before recovering. Running two to three full charge-discharge cycles through the base station raises the cell's effective voltage floor and eliminates most mid-call drop events.

Base station showing a charging error after fitting the new pack

The WiTalk9 base station communicates with the headset BMS to confirm cell presence before starting a charge cycle. If the cell ships at storage voltage — typically around 3.6–3.7V — the base may not complete the handshake on the first attempt and will flag a charging error. Remove the headset from the base, wait ten seconds, and reseat it firmly. If the error persists, hold the headset's power button for five seconds to reset the BMS, then reseat in the base — charging should begin within thirty seconds.