feel
Generally speaking, a good charger is a little bit heavy, weigh will feel have a lot of weight with the hand, this is because a good charging for more electronic components. So when buy, can take several different brands, different models of charger on the hand feeling, it's easy to feel their different weight. If you are online, you can directly on the details page to view the product, the weight of the Numbers, as long as it's not virtual target is will be helpful to the judgment.
interface
Now many of the charger is a USB charger and charging line separate, for different charging should be replaced when charging the mobile phone line. If buy is this kind of design of the charger, to pay attention to the interface of USB charger need to be able to completely joint charging line, and the interface is too loose or too tight is bad. Too loose interface is easy to keep the cell phone received unstable current, is also likely to form a strong current, while too tight interface is easy to break. In addition, the charging line and mobile phone interface can also refer to the standard to judge.
pins
Good USB charger pins are strong compact, but use a little force needs when charging can be received on the lug plate, if inserted batu is easy to explain the design of USB charger is problematic, best not to buy it. If purchased in offline, can it to try, but if buy on the net, inability to field test, Suggestions can return processing.
IC
Smart chip USB charger is important component, is equivalent to mobile processors. This chip can control and detect when charging current, voltage, temperature, etc. Now the smart chip USB charger use have been developed by the third generation, function is relatively perfect