The listing, enercell inverter has ended.
Enercell 90W Portable AC Power Inverter
This portable AC power adapter and 90-watt power inverter does double duty for you. Use it in your vehicle to power AC devices (up to 90W) or carry it with you to power your electronic devices that can be powered by the USB port on the inverter.
90 continuous watts 12VDC to 115VAC power inverter (3-ft. cord)
Portable power with a 4Ah Li-poly battery for portable use with USB jack
Accepts 3-prong grounded AC power cord
Directly powers your USB devices like wireless phones, handheld games and MP3 players
Inverter for digital cameras, some laptops, camcorders, wireless phones, games and many others
This is a very handy power source for running any AC device within the 90W capacity limit. It integrates a lithium battery with the small AC inverter in one small package. It has a cooling fan so there is some ambient noise. I use this device to power a pair of Audioengine2 powered speakers (which are remarkable in themselves) so my application is noise sensitive. I house the inverter inside a softpack carrier wish is used to carry the speakers and this pretty well baffles the noise. Could be used to provide extra power to laptops as well. The Enercell can be recharged from a 12-volt cigarette lighter or from a 120-volt wall outlet.