Probably not likely, how old is the battery? Typically they last about 5-6 years, but from what I've heard once they go dead once they lose something like 15% so if they keep dying it's probably time to replace. However, if you take the car or just the battery to a parts store they can check it and tell you whether or not it's holding a charge for free.
EDIT: Forgot to mention, be sure to have the battery fully charged before you have it tested, the machine needs a full charge to test. They can charge it for you for free, but you'll have to leave it there for a while.