I bought a new laptop battery on Amazon for my Thinkpad. When I plug it into my computer, the computer tells me the battery has 91% capacity. Am I being ripped off or is it normal for the battery to initially report a capacity of less than 100%?
It seems possible that you wouldn't be shipped a 100% charged battery.
It seems possible that the computer needs to cycle the battery fully the first time to know what 100% would be.
It seems possible you were ripped off, depending on the quality of the 3rd party seller, but unlikely, unless it was a very, very good deal.