12V power adapter on the market price varies, the same type of adapter pieces lowest price, highest can reach dozens of blocks. Power is related to the safety of the product, so try to choose a good quality. So how are we going to tell what their grades are, how to do the procurement of goods and value for money it back? How in the end should choose cheap 12V power adapter it?

1. You can usually see the power of the card table outside to see if there through relevant quality certification, quality certification by the more general the more shows the quality of the power supply is guaranteed, of course, if it is some of the counterfeit manufacturers may not certified yet branded certification mark on the product.

2. The cost of unlimited power adapter is impossible low, one thing to do it is a cost, finished lower than his cost price, imagine that there is a problem.

3. You can see the metal part of the material and plating. Exposed metal supply many good quality nickel-plated copper, or plating thickness will be relatively thick, high brightness. Therefore, we sometimes find some cell phone charger plug on rusted pretty soon, and brand mobile phone charger wife spent a long time there will not be rusty phenomenon.

4. See the manufacturer's reputation and evaluation, some good products has been able to survive for so long and it produces good products are inextricably linked, only there is no quality problem to get people approved to continue production down. Here recommend Shenzhen crown Dickson, who has 15 years of R & D and manufacturing experience. http://www.szgdx.cn/