The Duracell Power Reserve line of portable chargers are rechargeable Lithium Ion batteries packaged in several sizes to provide additional power on the road for portable devices, from cell phones to media players to even some digital cameras.
These don't try to provide adapter tips for all your various devices (see previous post on Energizer Energi To Go). Instead they feature USB and/or mini USB ports for compatibility with the growing number of USB-powered devices, and are recharged through USB (from a computer or USB wall charger). For other devices, you can use the USB adapter / cable that came with the device to connect to a custom interface.
The Duracell Pocket Charger ($19) is a 500 mAh pocket-sized, supplemental charger for cell phones, providing up to 60 percent more talk time. It has a swinging miniUSB charging arm.
The Duracell Instant Charger ($29) is a small (~ 3 1/2 x 1 1/2) 1500 mAh charger with a USB port, plus miniUSB (and cable) for charging, and a power switch. It provides up to 180 minutes of backup power for cell phones and the iPhone, and 45 to 50 hours for iPods like the nano and classic.
The Duracell Powerhouse Charger ($49) is a 2000 mAh device that can charge two devices at once, with a USB port and miniUSB arm, and power switch. It provides reserve power for cell phones, PDAs or MP3 players, and even many digital cameras.
These allow you to bring along backup power when you're on the road, in a small, light, and convenient package.
See my Portable Power Accessories Gallery for more on portable batteries and power options.
Find the Duracell Power Reserve Chargers on Amazon.com:
Pocket Charger - Instant Charger - Powerhouse Charger