if you suspect the battery, take it in and have a store test it. they do age to the point where they just wont hold a charge anymore.

 

Battery was new in January, but car was stored in a Tent outside for 3 months. I gave it a charge and it will run, but if I leave the battery for a while it is pooched. Gonna take the battery back, otherwise it will be time for a new alternator, but I doubt it is that as the battery even after a 2 hour charge does not have much amperage from the sounds of it.