There's a new, little-known method to bring almost ANY dead battery back life once more.
I have actually already tried it with automobile, laptop computer, and phone batteries that were completely dead. You can simply recondition your old batteries and save a lot of money. https://wiki.eqoarevival.com/index.php/The_Do_This_Get_That_Guide_On_Ez_Battery_Reconditioning_Does_It_Work