I currently use both the Eneloop and Pure Energy ones in my chargers. I've yet to have any problems with them. Whenever NCIX has them on sale I pick up some spares. Leaking is rarely an issue for them, or so has been my experience. Cheaper than pickin up non-rechargeable. To be fair, they aren't used continuously, aside from in the 360/wii controllers. I love 'em for remotes and my mouse, since those need recharging once in a blue moon. The Eneloop/Pure Energy ones are my fave, since they're often on sale for ~$5CAD for a 4 pack and last a long ass time. I don't care for the other non-rechargeable based on experience and price. YMMV and I may have been spoiled by online shopping :P