Replacement for Kobalt 40V Battery: 6.0Ah Lithium ion Replace for 40 Volt Max Batteries KB-540-06 KB440-06‎ KB240-06 KB2540C-06 KB640-03 Cordless Power Tool Battery (Blue)

Worked as good as Kbolt at half the price.Good charge rate.

I’ve had it 3 months now. Arrived fully charged. Much heavier than the Kobalt batteries. Right out of the box it seems to last about twice as long as the Kobalts on a charge. Fits all my Kobalt tools (2 chainsaws, leaf blower, string trimmer, hedge trimmer) and chargers like a glove. To be fair though, all my Kobalt batteries are more than 5 years old, but I’m pretty sure they never ran on a charge as long as this one does.

Great bargain. It looks and fits just like Kobalt and is much cheaper and more powerful. Haven’t had it long enough to assess battery life life

Works as described holds a charge well. A little pricey.

This worked beautifully... For one time. After re-charging it, it would power the mower for about ten seconds, then shut off. We tried putting it back on the charger, connecting the charger to a different power power outlet, charging a different battery (which performed just fine) with the same charger and power outlet, but it keeps coming back to this battery won't hold enough of a charge to run the equipment for which it was made. After days on end of pure frustration, I returned this item. If I could get back all the hours and days we've spent trying to get this piece of junk to work (I could've cut the lawn with a pair of scissors in this much time!) I'd be a less-stressed person. You always hear how cell phones are making people stressed... Maybe some people, but the bigger culprit for more people is overpriced crappy products that don't work right, even when they are brand new, and all the time wasted on trying to get them to work, finding out they are never going to work, and then returning them, and still not being able to get the work done, with no clue where to get a non-crappy product that WILL work. Throw this product on that heap.

I believe it's better than the original battery. Powers all my tools and fully recharges perfectly. Lasts a long time.

The battery works perfectly with our lonely leaf blower and weed eater.

Happy to report that this aftermarket battery has exceeded my expectations. For about 9 months I have used it at least twice a week in a blower, hedge trimmer, and weed eater. It does have plenty of power & also lasts longer than my one OEM battery that still works (but of course that one is an older battery now so that makes sense imo).