I have a two year old Interstate brand marine starting battery. It has not
been holding a charge suffiecient to start the engine. The battery is only
used to start the engine and is not used to power any accesories when the
engine is not running. It is stored out of the boat in my basement for the
winter and is then connected to a Guest brand trickle charger. I have
charged the battery out of the boat using an external battery charger in
an attempt to determine whether or not there is some sort of unknown drain
on the battery when it is not in use,, but the battery will not take a
charge strong enough to start th engine. The battery boasts a two year pro
rated warranty and as luck would have it, two years ended last month!

My question for the group is what is the average life expectency of a marine
battery? Should it be longer than two years? Anyone have a preference on a
good brand of replacement battery?

Thanks

Mark