iGo powerXtender provides emergency power for your mobile gadgets anywhere you go. Get up to 10 hours of talking, 20 hours of playing or 28 hours of listening. Uses 2 AA batteries (included) and iGo power tip technology (tips sold separately) to power/ charge your mobile gadget.
Solio™, the Universal "Hybrid" Charger is powerful enough to charge all of your handheld electronic products at home or on the move, anywhere under the sun.
Solio is a Hybrid because it can accept power from either the wall socket or Sun storing this energy within Solio's internal rechargeable battery. Solio then uses this energy to power your gadgets at the same rate as if they were plugged into the wall. Solio will also hold its charge for up to a year.
Energizer Energi To Go – Put the supplied lithium AA batteries into the holder and insert the cord into the holder then plug the adapter into the phone. This portable power supply comes in various flavors, each supporting different cell types. Not recommended if you are looking for an universal power supply.
Black&Decker Power To Go - Supplies portable 110 Volts AC (yes – it has an DC-AC inverter) & USB power to mobile electronics. Provides hours (up to 1, 4 or 9 hours - depending on the model: 10W, 20W or 100W) of extended runtime. You can buy these power sources online or at a local Wal-Mart or Home Depot store.
APC Universal Notebook Battery - Universal external batteries for notebook computers. While very good if you indent to power your laptop, these batteries are kind of bulky for smaller devices.
118Wh Portable Power Station - The BMW of battery packs which powers any device from 3V~28V. Features built in variable voltage selection from 3V,5V,6V,9V,12V,16V,19V,21V,24V,28V. Packed with power at 118WH Capacity.
USBCell – A simple rechargeable battery. Just stick it into a USB port to charge it and then use it on the go like a regular AA battery.
Tekkeon myPower GO uses 4 AA batteries and provides power via an USB connector. Should work with all cellphones, PDAs and music players that are recharging from an USB port.
Tekkeon myPower ALL provides up to 14V/19V and powers virtually any portable device—anywhere, anytime. With myPower ALL, you carry a single lightweight rechargeable battery to extend the play time on your portable DVD player, notebook computer, digital camera, camcorder, MP3 player and more.
APC Universal Mobile Device Battery - These external battery packs supply power via a USB port to any mobile device that can be powered using a USB charging cable (sold separately), like mobile phones, iPods, PDAs and more. They are also small and light enough to carry in your pocket.
Semsons' Pocket Power Bank with USB port has 2-in-1 design. You can use it as battery charger or as battery extender. It has build-in 100-240VAC charger with retractable AC plug. Add 4 X AA NiMh/NiCd rechargable batteries up to 2400mAh and use the USB output with Palm PDAs, cellular phones and other electronics via USB charging cable.
The Proporta Mobile Survival Kit includes the USB Mobile Device Charger (USB Rechargeable Battery). This handy product charges from any standard USB port and stores an impressive 3400 mAH of power for when you need it.
The XPower PowerSource Mobile 100 is a power solution with both AC and USB outlets. If your laptop battery runs low or you need more play time with your portable game console or portable DVD, simply connect your device into the AC outlet and keep going. Two USB charge ports will keep your Blackberry, iPaq, Palm, or iPod charged when you need it most. You no longer have to carry extra cords, chargers and device-specific batteries.
The Mobile Mini features a mini USB pivot arm so you can connect it directly to your BlackBerry and new Motorola phones such as the Razr and more. A second USB port is also featured so you can power two devices at once. The Mobile Mini’s internal lithium-ion battery can be recharged at home through a lightweight AC charger, through a vehicle’s DC socket, or at your computer from its USB port.
To DIY guys I recommend the Minty Boost article for technical details on building a portable USB power using 2 AA batteries hosted in an Altoids gum tin.