questionswhere might i find official microsoft xbox 360…

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just about anywhere, in store or online.
best option though, is a play-n-charge kit, where it charges while you use it as a wired, and then you can unplug it for a few hours too.

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Here's a great way to find them, or just about anything.

http://tinyurl.com/ygz7rdm

Hope that helps!!