Klipsch KMC1 Replacement Battery 7.4V 4400mAh Li-ion

Klipsch KMC1 — 7.4V Li-ion Replacement Battery

This is a 7.4V, 4400mAh (32.56Wh) Li-ion replacement battery for the Klipsch KMC1 portable Bluetooth speaker. It fits directly into the KMC1 battery compartment and restores power to the audio system and wireless radio. Use the capacity figure from this listing — 4400mAh — not third-party figures floating online.

• KMC1 compatibility: The KMC1 runs its amplifier board and Bluetooth radio from the same 7.4V cell. Both circuits pull from one pack, so voltage, cell count, and connector orientation all have to match exactly. This battery meets those specs.
• Bench tested on actual hardware: We ran this pack through charge cycles on the KMC1 board and monitored BMS cutoff behaviour under combined amplifier and Bluetooth radio draw. The protection circuit held within expected thresholds at both idle and high-volume load.
• Monthly discharge cycle for KMC1 users: If the speaker sits on a desk and gets topped off constantly, the fuel gauge drifts and capacity fade accelerates. Run the battery below 20% at least once a month before recharging — this recalibrates the charge reporting circuit and slows cell degradation.

Bluetooth dropping at high volume on the KMC1

At high volume, the KMC1 amplifier pulls a surge of current on top of the steady Bluetooth radio draw. If the cell has aged or has a high internal resistance, this combined load causes a voltage sag that trips the BMS or starves the radio. The result is a momentary Bluetooth disconnect or audio cut even though the battery indicator still shows charge. A fresh cell with lower internal resistance handles the combined load without sagging below the radio's minimum operating voltage.

KMC1 audio distorting before the battery indicator hits empty

This happens when the cell voltage droops under load before the gauge registers low. The amplifier clips because it is not receiving enough voltage headroom, producing audible distortion before any low-battery warning appears. The fuel gauge reads the open-circuit voltage, not the loaded voltage, so a degraded cell can show 30% while actually sagging into clipping territory under draw. Replacing the cell removes the sag and restores clean amplifier headroom down to the true cutoff voltage of 6.0V.