I can't speak for 3rd party batteries, which I would never trust or recommend, based on the number of problems people have reported with them. As for Apple batteries, it's perfectly normal for a battery to stop charging before 100%. Battery life from a charge is dependent on many things, including configuration and what you have running. How long a battery should last is based on how you take care of it. Details on these statements are found in the following link.I had my previous battery for about 4 years. I replaced it with a Nupower battery when I started getting charges of up to 88% and it would die in about an hour. I went with Nupower (bc I don't like to give Apple my money) and they advertise 5% more battery life. I have been unable to get it to charge to 100%. It stops at 99% and lasts about 2 and a half hours of just regular internet reading (no special programs, videos, etc...). I am wondering if I have a defective battery and if it should last longer?
Thanks, but I was not able to find anything on how long the battery is capable of lasting. If I recall correctly, my first battery lasted at least 4 hours (possibly longer). I do not have too many programs running - at least not much more then initially.