Kimo K16811 20V Cordless Chainsaw Replacement Battery 2500mAh
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Kimo K16811 20V Cordless Chainsaw Replacement Battery 2500mAh - is backordered and will ship as soon as it is back in stock.
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Battery Care Tips
Battery Care Tips
🔹 Getting Started
Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.
🔹 Keep It Healthy
Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.
Delivery and Shipping
Delivery and Shipping
🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.
Disclaimer
Disclaimer
⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.
🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.
Kimo K16811 20V Cordless Chainsaw Replacement Battery 2500mAh - is backordered and will ship as soon as it is back in stock.
Voltage
20V
Amp
2500mAh
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.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Kimo
- Manufacturer: CS
- Series: Standard
- Color: Black
- Product Type: Li-ion
- Battery Type: Li-ion
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
My Kimo chainsaw cuts out the instant I pull the trigger — is this a dead battery or a BMS trip?
This is almost always a BMS overcurrent trip, not a dead pack. The motor draws a sharp inrush current spike at startup, and if the cells are cold or partially discharged, that spike exceeds the BMS protection threshold before the chain moves. Warm the pack to room temperature, charge it fully, then attempt a light-load cut first. If the pack holds under light load but trips on hardwood, the cells are sagging under inrush — replace the pack.
The chainsaw bogs down mid-cut and feels like it's losing power without fully shutting off — what's causing that?
That symptom is voltage sag — the cell voltage drops under sustained chain-drive load, reducing the power the motor receives without triggering a full BMS cutoff. It usually means the cells have degraded from repeated shallow cycling and can no longer hold voltage under real cutting load. Check that the battery contacts on both the pack and the tool are clean and making full metal-to-metal contact — dirty rails increase resistance and worsen sag. If contacts are clean and sag continues, the pack needs replacement.
This battery barely performs in cold weather — is something wrong with it or is that normal?
That is normal Li-ion behaviour. Below 5°C, internal cell resistance rises sharply, which reduces the current the pack can deliver and causes the BMS to trip earlier under motor-start inrush. Store the pack indoors before use and let it reach at least 15°C before cutting. Do not charge a pack that is below 0°C — lithium plating on the anode is permanent cell damage. Warm the pack first, then charge it.
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