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Ok, now that the solar panel I have ordered works, and works easily with a current of 1.5 amps in not the brightest of sun and behind a window in the morning, I need a power bank.
I am thinking of just "building" one myself as suggested, but I am not gonna weld anything.
Any suggestions for a good box with inbuilt electronics to house at least 4 x 18650s?
Or is the electronics even necessary when you buy those really expensive quality 18650s with
protection circuits and whatnot inbuilt?
How is the voltage converted from 3.7 in/out to 5V standard for usb cables?
I don't mind if in the end this DIY battery pack is more expensive if
a) it works stable and delivers the power
b) it is at least as safe as the usual power banks you find on amazon
I might go the ultra minimalist route as well, in which there is already an usb connector built into the 18650 battery.
If this somehow works with recharging it up through the solar panel, and charging up a smartphone and maybe other devices, then it would be the most lightweight solution, but super expensive.
