a solar panel on something this size is pure gimmickry, and that tells you everything you need to know
Each side panel is what.. 40cm2 ? That'll be good for maybe 0.9 Watts tops, and let's overlook the fact you are cooking the battery by leaving it in the sun to 'charge' at around 1% per *hour*
Not only are crowdfunded projects fraught with risk in themselves, but for something that could potentially burn down your house if poorly engineered, this calls for even more caution than usual.
A new power bank is said to offer particularly high output and does not require a charger for recharging, effectively functioning as one itself. The gadget is also available with the usual EU plug.
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