Got this as a replacement for my original battery of my Compaq Presario CQ61 laptop, was a bit afraid that it would be the wrong one as I visited dozens of sites looking for a replacement and that seemed to be the main complaint especially when there are so many model numbers in the title of the product. Was hoping it would work out a bit cheaper, but it still bet the ridiculous price to get one off the official HP site. Battery life is just like the original at the start, had it a while now and hasn't gone down by any noticeable levels, still get about 2 hours of moderate use (Internet mostly)