Engadget: Rechargeable batteries keep a lot of toxic goop out of the world's landfills, but ones that drain themselves whilst just sitting there in the drawer aren't exactly perfect themselves. Sanyo licked that problem with its eneloop cells, thanks to their low self-discharge rates, and now the company is doing even better: boosting capacity. Sanyo will soon ship the eneloop XX battery in AA size, a 2500mAh cell that offers 25 percent more oomph than its predecessors. Even more important? The black and silver logo that serves as "a further testament to Sanyo's design strength.