Sandberg has a rugged powerbank that eats all these for breakfast. It has 72000mAh and up to 24V charging supwrior in all ways to these powerbanks. Sandberg survivor 72000 7v1
20.000mah battery? it can charge a samsung S8 3 times? which has 3000mah capacity.... your number 1 choice is 10.000mah and not the 20.000mah that they say aqnd you are trying to tell us here