I haven't been looking into powerbanks for phone, so thanks for the heads-up on this. It would probably be a good thing to have for the phone on a trip, regardless of camera issues. My current camera can't charge via USB, but hopefully the R5 & future cameras can, so that would mean a powerbank could assist the camera if it had GPS as well, so that would allow extra power to whichever way you get GPS.You actually can, those single 18650 sized powerbanks are awesome. And unlike Canon cameras, you can charge your phone during use.
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