This KeyChain USB Emergency DC Battery Charger could save you a lot of hassle if you happen to leave home without your camera or phone battery charger. It clamps onto any small Li-Ion battery, like those in cameras or phones, and charges them via USB. There’s even an optional mains-to-USB converter. US$11.90 or US$14.90.
You don’t have to bring with your bulky charging kits for your DC. The Tiny KeyChain USB Emergency Charger can charge most of the portable DC Lithium Batteries through your Usb or the AC Adapters!