Prosthis was a replacement for my original...not a backup. once installed properly, not too difficult, it's working fine. overall, a necessary purchase that gets your computer up and running again.
Consinstalling seemed easy, but i had to readjust a couple times to get it to work. doesn't hold a charge as long as the original one but, my computer functions all the same.
23 of 33 people found this review helpful.