ThinkGeek's USB Battery Charger
If you are not yet using rechargeable batteries in your flashlight(s) and other gadgets you may be missing out on some savings since the chargers have become relatively inexpensive and some can be powered via USB ports when your computer is in use. 'Pop 4 AA or AAA rechargable batteries in the USB Battery Charger, plug in to your desktop or laptop computer, and wait for a few short hours, and you have enough juice to run your digital camera, MP3 player, or R/C Helicopter. Sweet! The USB Battery Charger comes in black, four inches square and 1 inch high, with a translucent cover. It charges 4 AA or 4 AAA rechargable batteries (or 2 of each) in 4 hours. We cannot stress enough how important it is to NOT try and recharge alkaline batteries as some have been known to explode rather unpleasantly.' The USB Battery Charger is available ThinkGeek for $11.99.
Source: ThinkGeek