One of the cells in a string of nine had lost its ability to hold a charge and the two month sit had caused it to drag a whole string down to dead!
Dammit that is nine more 5S1P Cell packs that I am going to have to attempt to de-solder! Luckily I have just enough spare cells to swap them out.
Swapped out the nine dead cells and balance charged the whole pack, There may be signs of other cells in this box nearing failure but I want to get the pack back together and in the car so I can test a new rotory wafer switch I bought recently that should allow me to wire all 12 balance cables to the Hobbyking battery monitor widget in the car whilst driving and check the status of each bank whilst the car is under load i.e. driving.
All I will need to do is switch between each bank in turn whilst the car is under load and I should be able to spot the voltage drop on any bad cells being much bigger than the others, basically just look for the bank that has the lowest voltage whilst under load, pull that bank and test each cell. It just gives me a way to check the cells under load.