Well, I don't know if my system is better, but it's what works for me. I have to maintain my iPhone, a small camera and my InReach mini when I'm out. My system comes in at ~8 oz (w/o cables). ?And, my system works when the sun isn't shining and I can daisychain the solar panel to my power bank to my camera/InReach/Phone if I want.
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It doesn't look like the Solarpad Pro is available on Amazon, but there must be similar small panels.
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Tim
Tim Mulholland