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RE: City wide electricity outage this morning in Amsterdam - 360,000 homes without power (including ours)
I had a hand cranked USB phone charger but never really try how long i need to get it up 1%. maybe, need to get a radio+LED light powered by power bank and get a solar charged power bank. together.
Yeah this one is a powerbank so u can precharge the bank with micro usb and then you can recharge the device via solar or cranking. Both will be very slow i think :)