How do i manage to re-charge my battery at Yosemite campsites for Day-2 and Day-3?
Any suggestions?
How did you guys do it?
they have little solar powered battery chargers.
http://store.solio.com/s.nl/it.A/id.80/.f?sc=7&category=109 $80
http://store.solio.com/s.nl/it.A/id.257/.f
$100
http://store.solio.com/s.nl/it.A/id.172/.f
$200 + almost impossible to get because its so new and amazing

Carry spare batteries. Another option is to get yourself one of those fuel cell batteries. I have one of those just in case the big one hits and I need to use my phones. But it might be more cost effective to just buy a spare.
References :