In searching for a battery for a work laptop, I was greatly surprised to find a battery that actually fit perfect that was not an OEM. The battery fit perfectly and is working perfectly. The laptop is a 17 inch Dell that weighs a ton based on other laptops I've owned/used, so the length of time to work on battery is not that long, but long enough. I honestly can't say for sure exactly how long, but I know it's at least 2-3 hours. My 14 inch laptop only lasts about 6 hours.
Awesome