The Energizer “Energi To Go” emergency charger for mobile devices and cellular phones is a gadget falls into the “When I need it, I really need it!” category.

The premise is simple: Load the device with two AA batteries (Energizer recommends their Lithium batteries, but it works with any type of AA), plug in their cable, then attach to your mobile phone or PDA, and voila! The LED lights up, and you’re charging. (The speed and quantity of power charging will depend on the type of AA battery used.)

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