Get a separate panel with charge controller, built in or otherwise. Those powerbank with built in solar panels are a scam.


Mind I ask what you are using it for? Unless if you are going for off grid hiking and camping with weight issue, easier just to get a big powerbank or powerstation that would last a few days. Either that or get a phone with an obscenely sized battery if that's the only thing you need to charge.


I am using a ulefone power armour 13 with a 13200mah battery. Good for 3 to 4 days camping use.