There's a new, little-known means to bring virtually ANY dead battery back life once again. I have actually already tried it with cars and truck, laptop computer, and phone batteries that were totally dead.
You can just replace your old batteries and save a lot of cash. https://www.localtrusted.co.uk/wiki/index.php?title=Ez_Battery_Reconditioning_Does_It_Work_:_The_Ultimate_Convenience