This allows riders to gain comprehensive, accurate ride data from a dedicated device, while keeping their phone out of the elements and saving its battery incase of an emergency.

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After entering the planned departure time in the vehicle or the web portal the vehicle will be fully charged in a battery-saving and economical way, and pre-air conditioned if required so that it is ready to start.

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Alta's technology can reduce that battery weight by 70 percent, saving approximately 25 pounds of pack weight.

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The energy-saving LED technology and the high-capacity battery allow users to display videos with full brightness for up to 80 minutes without need to recharge the battery.

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These, combined with its battery-saver core and energy-saving PRISM 2 technology, deliver hours of gameplay on a single charge.

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In my battery tests, where I turn off all power-saving features, crank the screen brightness up all the way, leave the Wi-Fi on, and play a continuous loop of music, they fell well short of that.

WSJ: Ultrabooks Bring Light and Speedy to Windows

Thanks to an energy saving LED light source, the light-weight presenters offer a long battery life of up to 80 minutes.

ENGADGET: Toshiba outs Lumileo pico projectors, only one of which requires a plug

In my test, where I use full brightness, disable power-saving software, leave on the Wi-Fi, and play a loop of music, the battery on the XPS 13 lasted just under four hours, the worst I've seen on an ultrabook.

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In my tough battery tests, where I set the screen to 75% brightness, turn off power-saving features, leave the Wi-Fi on and play locally stored videos until the machine dies, the Surface Pro did pathetically.

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