96 club car batterys


I have 1996 regen braking electric glub car and i put new batterys in it in April 2010. and it ran great. but know after a charge it will get slower and slower on 18 holes and the batery light will come on sometmes after a couple holes
Could it be a battery that is bad or should i look at something else, also there is a selinoid clicking when im stoped and setting there could the selinoid be bad. I have reset the OBC and still didnt help, Possibly charger? it seems to gop through the proper kicking off and on when i plug it in, I can go back the next day and unplug it anplug back in and it is charging again. Please help me look in the right direction