Sanyo’s new “Eneloop Stick Booster” takes two of technology’s ubiquities, USB and batteries, and puts them together into a sleek aluminum stick.

Sanyo’s Eneloop batteries are already a smart choice when looking for rechargeables. Not only do they come fully charged and ready to use, unlike your regular Ni-MH cells, neither do they leak their charge slowly over the days and weeks. Ever thrown a set of charged batteries into a flashgun only to find them empty? That won’t happen with the Eneloops.

The Stick Booster is a charger in a tube. Hook it up to a USB port to top-off the two supplied AAs. From here you can put those batteries into a camera or other device, or hook an iPod or cellphone up to the USB-out directly, offering a versatile emergency charge. There’s also a switch on the side that lets the batteries discharge a higher current for particularly thirsty gadgets like the iPhone.

The Stick Booster will be available in December for ¥3,100, or $35.

Product page [GeekStuff4U via Akihabara News]