Absolutely no power

Hi guys, I'm back with the same problem...The battery charged via a trickle charger. once i remove the charger it dies in a matter of an hour. Strange thing is that when i connect the battery charger it states 95% charged, but there is zero power, no dash lights, stairs dead etc..I also found my lippert slide controller is displaying a fault code 9, which states "hall power short to ground". I had warranty work done and Camping world took off the whole slide to replace some parts last summer...Could this have caused the battery to fully discharge?
I have to pick up a multimeter this week to test the battery, haven't had time yet. :-(