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)

Works better than original , more power and last longer !

For the price it’s very cheap, but it works great love it

Good replacement for Kobalt mower battery. Run time varies depending on grass lenghth, but it will usually last about 1.5 hours.

This works as it should. Has lasted longer than original

It is a good replacement battery it holds the charge .I got my yard done with it without having to stop and wait for it to charge again

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.

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.

Good battery but is too much for my Kobalt lawnmower so put it in the newer tool..Kobalt blower