First, the car charger must have a constant voltage and current in the process of charging, and the voltage and current can not be too large or too small. Too much current will cause the mobile phone battery to heat up, the current is too small charging speed will be very slow, of course, the voltage is too high may also damage the electrical appliances, the specific data or the phone's own parameters prevail.
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Second, the car charger we use must meet the three C standards of electronic products. Here to remind consumers, choose the car charger, remember to buy the right not to buy expensive, in the face of many brands on the market car charger, choose a reliable quality car charger is very important, not because of the desire to buy cheap goods, so it is easy to burn their own mobile phone when charging, it is not worth the loss.
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Third, the protection circuit of the car charger itself must pass, over discharge, over current and short circuit must be well protected. At present, many car charger protection circuits on the market are completely absent, so consumers should pay special attention to the above problems when buying car chargers.