Thats right! you, too can plug four batteries into four available USB ports on your handy laptop, leave it on overnight (connected to wall power, since few laptops are capable of running full-on for 5 hour straight) and have a fresh set of batteries in the morning!
Hmm, I have several sets of NiMH batteries and a 15min charger at home. Its small, easy to pack and takes minutes to charge, and the batteries run for 1/4 the price of these. Heck, the charger costs as much as 1 battery. Oh, and don't forget: My batteries are 2500mah, these are 1300mah. You'd be better off stocking up on Alkalines.