With USB interface is unnecessary car charger
There are a lot of car is with USB interface, and possibly more than one mouth, most people think that use the car USB recharge my mobile phone or any other device. Actually this kind of idea is wrong, for the vast majority of the car's USB interface is set for data transmission, so part of the vehicle is far from the interface of the current 5 v / 1 a, the front for everyone to explain the charging current "but not small", if you use the car USB interface to recharge my mobile phone even tablets, if current is not up to standard can make the equipment damage. Another android charging machine or a tablet will also for charging equipment identification, each car design is not the same.
Say so, may be you will not, after all, with the car's own USB charging convenient and save money, have a web site has done a test to a different model.
Output current can reach more than 0.9 A general charge their phone will not have what problem, but for 2.1 A tablet and part 2 A android phones, it is far from enough, let alone those is only about 0.5 A car. In addition, some of the android mobile phone in the car USB charging can be embarrassing, A drop below 0.5 A current situation, the reason is that part of the car system identification problems for some android phones. Therefore recommended if there is one charge or buy car charger is better.