Konftel 300M Conference Phone Replacement Battery 7.4V 6800mAh

Konftel 300M / 300MX / 300W / 300WX — 7.4V Li-ion Replacement Battery (900102095)

This 7.4V, 6800mAh Li-ion battery replaces the original pack in Konftel 300M, 300MX, 300W, and 300WX conference speakerphones. It slots directly into the battery bay and restores cordless operation for portable meeting setups. OEM part numbers covered: 900102095, AEC18650-2S2P, and Li18S.

• 300-series platform fit: The 300M, 300MX, 300W, and 300WX share the same 7.4V two-cell architecture, battery bay dimensions, and connector pinout — one pack covers all four models without modification.
• Bench tested on actual hardware: We ran this pack through charge and discharge cycles on a 300-series unit. The BMS responded correctly to the dock charger handshake, balancing both cells and triggering protection cutoff at the expected low-voltage threshold.
• First-session calibration tip: After installing this battery, run a full charge cycle before your first meeting. The 300-series maps battery state during normal operation — the indicator may display inaccurate warnings for the first session until the unit completes one full charge-to-discharge cycle.

Battery indicator showing wrong level after installation

Konftel 300-series units track battery state using voltage-threshold mapping built up over charge cycles. A new pack has no stored history, so the unit has no reference curve to read from. This causes the indicator to display incorrect charge levels — sometimes showing near-empty on a full pack, or failing to update during use. One complete charge cycle from flat to full resets the mapping, and the indicator returns to accurate reporting.

Conference unit not turning on after battery swap

Replacement packs shipped from storage can sit long enough for cell voltage to drop below the BMS re-enable threshold — typically around 2.5V per cell in a 2S configuration. When the unit detects voltage below this floor, it refuses to power on as a protection measure. Place the pack on the dock charger and leave it for at least 30 minutes before attempting to power on — the charger applies a pre-charge trickle that brings the cells back above the cutoff floor. If the dock LED does not respond at all, clean the dock contacts and reseat the pack, then retry.