Hybrid Battery blocks and a few other questions!

So I'll try and make this as short as possible I acquired a 2005 Prius base model from a family member that passed away it used to have all the power in the world coming from the hybrid drive but now the most I'm getting on a charge for the hybrid battery is two actual bars it does go to a full charge but if you shut it off and you turn it back on it's instantly two or three bars so I know I've got an issue with at least one cell or one module so I am in search of the person on the forum that actually sells replacement modules in blocks I guess he sells 14 blocks for a refurbished battery basically my other question is to sounds that come from the information center in the dash of the car once in a while I'll be driving down the road and obviously my cluster of lights is on because I've got a hybrid battery problem but just all of a sudden I'll get this high pitched wine like I can't even explain it and it doesn't go away until you shut the car off and turn the car back on what is that what why is it doing that it's trying to tell me something but I don't know what any insight to that the either of these would be much appreciated!