2, the input is different: the former output is 10w, the input is not said, it may be 1A, that is, 5w, much slower, so the input size of different models of charging treasure will also be different.
3, the price is different: the same brand of charging bank, double USB output 2.1A speed charge and 18W: PD two-way fast charge prices are different, double USB output 2.1A speed charge because the plug is different, so the price is higher.
pd two-way fast charge means that fast charging can be achieved when using fast charging appliances to charge the charging bank, and fast charging can be achieved when the charging bank charges the mobile phone, generally referring to 5V\/2A fast charging.