Designed for the iPhone 4 (though it will presumably work with the iPhone 4S too), the Pocket Projector looks basically like a bulky case for the smartphone that happens to pack a DLP pico projector inside. The native resolution is just 640×360 pixels, but it can project an image of up to 50-inches from a distance of eight feet. That shouldn’t be too shabby for a short video or brief presentation.

It’s not the brightest thing in the world at 15 lumens (LED lamp), nor will it be particularly loud with its 0.5-watt speaker, but at least it’s something. The 2100mAh internal battery on the Pocket Projector doubles as a backup battery for your iPhone too. And yes, it’ll work with any app that supports a dock connector-style video-out protocol. It ships in two weeks for $230.

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There may be other pico projectors that are brighter, but they’d require an external power source. With the P4 from AAXA, you can do it off a battery and have your PowerPoint presentation ready to go anywhere you are. Just bring along the laptop.

The AAXA P4 Pico Projector is powered by a 750MHz Windows CE mobile processor, but how bright is bright? Well, it gets an 80 lumen high-contrast optical engine by way of Texas Instruments’ DLP. This works in tandem with AAXA’s Vibrant Color tech, utilizing 15,000 hour LEDs and an image of up to 80-inches (but only in low light conditions).

Rounding out the specs are 2GB memory, included tripod, 1280×800 VGA input, microSD slot, composite video input, 1-watt speaker, 3.5mm headphone jack, 720p video support, and support for 3rd party apps like Office Mobile, Adobe PDF viewer, and other Windows CE apps. The rechargeable lithium-ion battery is good for 75+ minutes. MSRP is set at $399, but that’s been reduced to $339 for current pre-orders.

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3M’s release of the MP180 sets a new standard for the infant industry of pocket projectors with a brighter bulb, better resolution, more features and a longer-lasting battery than many competitors.

Built for business professionals and “mobile road warriors,” its SVGA resolution will make your presentations look better, even in brighter settings. And it won’t die on the third slide of your powerpoint: It’s good to go for two hours on battery.

It’s got WiFi, so you can use the integrated web browser through the touchscreen on the top to find and display web content – or snatch someone else’s powerpoint presentation from pppst.com if you spent the first night of your business trip drinking rather than making one. Though, you may want to do this at the hotel and save it to the 4GB of internal memory before you get to your meeting.

Use the Bluetooth, WiFi or a USB connection to play movies. Plug in your headphones and wear down the battery on the way there using the integrated MP3 player. Slide in the micro-SD card from your cell phone to show off the photos of your pub catch to your buddies once you’re back in town. No task is too much, too extreme, too demanding or too unprofessional for the MP180.

“The 3M MP180 is our brightest and best-equipped projector to date,” writes Mark Colin, vice president of 3M Mobile’s Interactive Solutions Division. “Its unmatched versatility and superior image quality is perfect for the mobile road warrior. And, with two-hours battery life, people can rest assured that they will be able to get through just about any presentation without needing to recharge.”

A bonus? At $450, it’s easy enough to pass off as a business expense.

[3M Product Page]

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