1.Rely on the eyes

      In fact, here is to say that you can see the power bank quality through checking the appearance design,the work details and the product dimension.

      For the appearance design,you can see if there is a burr or upper andlower cover,or if it is clean at the combination of various parts.And you can check if the gap is uniform or the shell has shrink phenomenon.

      Above ways should proceed in the lamplight.If there is a flaw,it will be seen out obviously when backlighting shooting. Also,we should pay attention to the color difference of the power bank surface,as well as wheather there are black spots,etc

      2.Test

      If convenient,you can try the real charging effect by yourself.When your mobile is out of power or has little power,connect it with this power bank to see if this power bank can work smoothly.This way can test the circuit design of power bank.

      3.choosing

      Choose is to consider the manufacturer,brand. Power bank is a new industry, there are a lot of brands to enter, which leads to the consumers do not know which brand is good.            

      In this case we need to do a little more homework to learn more about vendors and look at their origin.Usually a brand into the industry for a long time will be more trustworthy.

      And the kind of battery is also an important factor. Compared to ordinary 18650 battery,the lithium polymer battery is more safe,stable and has a loner service life.