So I bought some of those AA Lithium Batteries to use in my wireless mouse and after about 2 months of use I was surprised to see that my battery light was blinking. 2 Months was the life of my normal batteries and these Lithium batteries were about 4x the cost. I guess i'm a marketing Sucker. After doing a bit of research http://www.tomsguide.com/us/rechargeable-batteries-cell,review-1525-6.html They seem to recommend these Sanyo Rechargeable eneLoops. I also heard that they wrap AA's in a larger Cell and Call it D's. Never buying Energizer again.