They shows capacity of 10000 mah but when I use this it isvery disappointing because I checked it it only charges 8000mah quality is not very good kooks are not very good charging speed is very slow quality is poor it cant charge 2 phones at a same time I does not charge properly big smartphones very bad power bank from intex I campare it with mi powerbank which far better than this speed of charging is half than mi powerbanks its totally a waste of money in my opinion never buy this power bank.