About this replacement
Kimo 6 Inch Cordless Chainsaw — 20V Li-ion Replacement Battery (K16811)
This is a 20V lithium-ion battery rated at 2500mAh (50Wh), built to replace the original pack in the Kimo 6 Inch Cordless Chainsaw. It fits the K16811 platform along with compatible models including QM-6001, QM-T20, and QM-3061B. Same voltage rail, same connector footprint, same BMS handshake protocol as the factory unit.
- K16811 platform compatibility: The QM-6001, QM-T20, and QM-3061B models share the same 20V battery rail and connector housing as the K16811. The BMS on each of these tools reads the same cell identification signal, so this pack initialises without error codes or reduced-power modes.
- Bench tested on actual hardware: We ran this pack through full charge-discharge cycles on the K16811 platform and monitored BMS cutoff behaviour under both trigger-pull inrush and sustained chain-drive load. Overcurrent protection triggered at expected thresholds and the pack recovered cleanly after thermal events.
- Motor inrush break-in: On first use, run the chainsaw at light load for two cycles before cutting dense hardwood. This lets the BMS profile the motor's inrush current spike and calibrate overcurrent thresholds before heavy-duty cutting puts maximum draw on the cells.
BMS cutoff on trigger pull — why the Kimo chainsaw stops the moment you squeeze
Chainsaw motors draw a short, sharp current spike at startup — often two to three times the running current. On a degraded or cold pack, this inrush spike can exceed the BMS overcurrent threshold before the chain even starts moving. The protection circuit opens, the tool cuts out, and the trigger feels dead. This is not a tool fault. It is the BMS doing exactly what it should — protecting cells that can no longer absorb the surge cleanly.
Charger blinking red on a new pack that sat in the box
Li-ion packs that ship or sit in storage for extended periods can drop below the charger's acceptance voltage — typically around 2.5V per cell. When the charger detects voltage below that threshold, it refuses to begin a standard charge cycle and signals the fault with a red blink. Place the pack in the charger for 10–15 minutes anyway — many chargers will attempt a trickle pre-charge to bring cells back above 3.0V per cell before switching to normal charge mode. If the red blink clears and the charger transitions to green, the pack has recovered. If it does not clear after 20 minutes, measure cell voltage across the terminals — a reading below 14V on the pack as a whole indicates deep discharge that the BMS has locked out.