The PowerTraveller Powermonkey Classic Portable Charger is now at Buy.com for $10 after a $50 mail-in rebate (expiring 5/18). This comes with a variety of adapters, making it compatible with iPods, digital cameras, PSPs, as well as Nokia, Mini Nokia, Motorola, Samsung, Siemens, and Sony Ericsson mobile phones. It's rechargeable, so no batteries are needed. Shipping is free and there's no sales tax (except CA, MA, MD, TN). New Google Checkout users can get a $10 discount for signing up.