I would start by cleaning the battery terminals. How soon after taking your 11 year old battery of the charger did you take a reading and get 13.5 v? That could be just a surface charge if you took the reading an hr after you charged it. At any rate if you don't want to buy a new battery I would charge all 3 let them sit over night take a reading on each one and if you see 12.6 v on two of them wire them in parallel and see if the engine will turn over. Once you know your connections are free of corrosion and you have enough CCA's to turn the engine over(if you have house batteries which are good you can use your emergency start button also) and it still wont start the next step it tom look at the starting relay. See if you are reading 12+ v on each side of the relay. Try all that and let us know how you make out.
