Hello all. I just picked up a BCD436HP AND WAS WONDERING if I can plug my scanner into a external battery back while I am out and about. I have one of those battery packs that you can use to charge your phone while you are out and want to use it for the scanner when I am outside all day and away from a power source. I believe the powerpac is something like 2800mah? Thank you in advance. MikeR