I use vast numbers of rechargables (I've a Sanyo charging station which can charge 20 cells at once with storage for 44) and the Eneloops have made a great difference to the way I use such cells: previously, I'd recharge everything before use, but now I'm happy to leave the cells in equipment until I get the low battery warning: in practical use, I get longer real-world use from my 2000 mAh Eneloops that my 2500 mAh stuff in things like GPS, flashgun and power grip simply because there's almost no self-discharge when the unit is off. As a side effect, I'm using up my 1000 Eneloop recharges much slower than other cells.