Teach you how to distinguish cottage mobile power

One of the signs of the cottage: not marked USB output current value. In this case the output current of the USB port may be only 0.5A

Sign two: electrical parameter error. For example, mAh written mA, behind the battery voltage is not standard, because there are different 3.8V and 3.7V core, the corresponding energy is different. In addition, marking the parameters of the core voltage is not very amateur practice.

Shanzhai sign three: over 8000mAh capacity, USB output current is still only 1A. To increase the capacity of mobile power supply, we need to increase the output current. Large capacity mobile power even less than the cost of circuit components are reluctant to change, it is difficult to expect them not to do in the core.

Sign four: energy conversion efficiency of less than 75%. Energy efficiency is measured by the release of the energy divided by the energy of the core labeling (common watt hour mark), decent products are more than 82%. When you see a mobile power mobile power energy conversion efficiency is only 70%, so there are two possible, should not use components too poor, high fever, heat loss; or the electric core energy deficiency, resulting in increased efficiency formula denominator. In either case, are copycat and profiteers practices.

Sign five: can not be rated current load. In 2011, we tested a lot of mobile power supply can not be more than half of the rated current load, such as the 1A current is marked, the actual maximum load current of 0.7A. This situation and a 300 Watt power supply on the label affixed to the nature of their own is a 450 watt power supply, the virtual standard.

Cottage logo six: low prices. When you see the capacity of tens of thousands of mAh, the price is only a few dozen mobile power supply do not buy, serious brand products will not be so low. 10000mAh mobile power retail price is also close to nearly one hundred dollars.

The sign of the cottage seven: three products. You will find a lot of products above there is no brand information, as well as any information on the outside of the packaging business, no factory name, no address, no trademark. This is not the case when there are only a few common signs, and there is no security, no security.

Cottage sign eight: low safety factor. News about the security of mobile power common, including its nature, explosion, etc., in order to secure their own property safety, be sure to buy high security performance, brand protection of mobile power.