In reply to bpmclimb:
> Ok, now seen lots of previous threads on this - probably need to me more specific with my question! In the UK, camping (away from mains power sources), climbing trips by day.
They will not be great in the UK, for obvious reasons. However, you will want both a panel and a battery.
I have a folding panel about the size of an A4 piece of paper when folded and a battery about the size of a smartphone, both made by Anker. The combination worked well in the Himalaya, but then they get sunshine there.
Don't get a cheap battery/panel combination thing. They are rubbish.
Post edited at 14:48