Hey, I have a fair bit of experience with battery pack and the cells within them so firstly there's a good chance I will be able to fix the battery pack or slow it's decay significantly if that's what you're after, otherwise I can recycle the components and put them to good use and save you from having to spend the money to pay for their proper disposal...
If you have a handful of old dead power tool batteries then in exchange, when I'm done with them, i'll be able to create a cell phone charging battery pack for you as a bonus :)
One way or the other thank you very much for your time,
callum