Building a Better Battery

I have a box of used alkaline batteries at home. I can't convince myself to throw them away since they are still holding 2/3 of a full charge. This is all the fault of my digital camera which takes four batteries at a time and only uses 1/3 of the batteries' charge before deciding that it needs more power. Luckily, I bought a wireless mouse several months ago and it will happily accept a 2/3 charged battery and drain it down to 1/3 of a charge before needing a replacement (and this takes a long time). In the March 2006, issue of Wired there is an article about the M1 battery. It is made by DeWalt (Black & Decker) and it is suppose to have double the power density, five times the peak energy, and a shorter recharging time than a Li-ion battery of the same size. Li-ion batteries are suppose to kick the crap out of alkaline batteries. So, that being said, where is my double-A M1 battery?