ndbwhunter
WKR
I'm looking for a new external battery pack for keeping my phone charged. I would really like something that had enough capacity to charge my GPS, but I don't remember if the Garmin Rino 530 has a USB for charging. The Anker Astro Series packs are rated pretty high, but I don't have any experience with good battery packs. I'm thinking it would be nice to have along for "checking in" and emergency use. What do you guys use and is it worth weight?