There's a brand-new, obscure method to bring nearly ANY dead battery back life once more.
I've already tried it with car, laptop, and phone batteries that were entirely dead. You can just recondition your old batteries and conserve a great deal of money. https://www.localtrusted.co.uk/wiki/index.php?title=What_The_Experts_Aren_t_Expressing_About_Battery_Reconditioning_At_Home_And_How_It_Affects_You