Is near such entity as an electrical adapter that uses battery and doesn't plug into the wall?
Answers: yes
Energizer has at lowest one for mobile phones
http://www.amazon.com/Energizer-Portable...
Yes and various stores deal in various types, one of my favorites be made by radio shack because it was a small cube near a built in plug for charging that folded into the part. In almost all cases these things are expensive since radio shack discontinued it, it was 60 dollars and I don't ponder the variants are any cheaper.
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