I'm new here, but what I know about this is ; It is what you want to be able to do.
So if you want to do something differently (eg one photo every holiday) the answer is different to ; I want 2 AA batteries to last the whole honeymoon.
For me, for what I may want to do, I carry 2 very good disposables (can go in radio/torch whatever) and use 2 for a £1 rechargeables all the time, carry as many as. I got recommended the £world batteries and they (for my use) are a terrific bargain. I cannot justify the cost of being able to keep fully charged batteries - but I would if I was offgrid!