Review on Upgrade Your Craftsman Tools: Enegitech 19.2V 4.0Ah C3 High Capacity Lithium Ion Battery Replacement (2-Pack) by Eric Jenkins

I was a little skeptical buying a non-OEM brand battery. I must say though, this battery exceeded my expectations. I received it with 75% charge (3/4 power level). I finished fully charging it. I have a C3 cordless chainsaw, I figured this would be a true test to the capacity of the battery since they draw quite a bit of power. I was able to cut 12+ logs that were 6-8" in diameter easily, and a handful of small limbs that were about 2" in diameter, and still had between 50-75% battery remaining.While I haven't had the battery long enough to truly test long term durability, so far I'm impressed!