I need a new camcorder battery-a ?

[Horseshoes]

My battery doesnt hold the charge anymore, I can get about 2 minutes on a fully charged battery

If I buy a new one from the manufactor, its about $45, if I get one from one of those online battery stores, its about $20. THe model numbers are the same and says it is compatible with my camcorder.

My question is, do you think those cheaper battery sites are worth it, is it a good quality product or should I just spend the extra money and get what I know will perform?

THanks