For backpacking mtn missions I use a Goal Zero 5w panel and Goal Zero Flip 12 battery pack. I only need to keep my phone and InReach topped off and this setup is more than adequate for that and as light a combo as I was able to put together.
During the day the panel charges the battery pack either on my pack or at camp, and then I use the battery to top of my electronics each night. I am rarely below 85% even in times where the weather sucks and the solar isn't really cranking.
short A lightweight solution for on-the-go power from the sun, the Nomad 5 features 5 Watts of monocrystalline laminate in a rugged enclosure with an easy-to-use kickstand USB output and built-in Flip Power Bank dock. features NOMAD 5 HIGHLIGHTS 5-Watt panel gives you the solar collecting...
www.goalzero.com
short Buy 2 Flip Power Banks and get 1 Free Flip Dock. Add 2 Flips and Flip Dock to your cart for promotion to apply. Good things come in small packages. Stylish and strong, this power bank is ideal for keeping phones and small devices charged up and ready to go. features FLIP 12 HIGHLIGHTS...
www.goalzero.com
I am still a little disgusted with myself that I have become so dependent on electronics in the mountains. I used to have a pretty firm stance against that, but between aids to navigation and emergency comms, I've changed my mind on the issue.