[scottyb]

5 amp charger is not good for the Trojan or any golf cart batteries. Golf cart batteries require amperage equivalent of nearly 10% of their amp hour capacity in the bulk replenishment or initial stage of charging... they also require an algorithm which only GC chargers can do.
Even if you got the small T605s they have a 200 AH capacity and require close to 20amps. The T105s are 225 AH capacity.


You Need an 18amp min charger.

Hard to say if you have the meter hooked up wrong or the batteries are getting low without a handheld meter to check things with.