I don't know if the battery would be the cause of that or not. I sounds to me like there could be other areas of the system that warrant inspection. Battery's are something we all take for granted. If it starts it must be good but what happens if the alternator system goes blink? How long is your battery going to last to get you back to the ground? Something that I have thought a lot more about and especially after reading the article from the link below. A simple battery minder will help to extend the life of a battery especially if it gets low use. It has caused me to reconsider my complacency about batteries.
http://www.avweb.com/news/features/K...g221073-1.html