With the rapid development of smart phones, the field had been used as rescue more mobile power, in their daily life is rarely used, and now has become the focus of consumer concern, especially some phones can not replace the battery, the lack of experience Under the circumstances, only by electric charge treasure or an external battery to an emergency, and thus created the current mobile phone market hot charging treasure. However, mobile phone charging treasure market was mixed, product quality varies greatly, plus the majority of consumers in the purchase price of the product only concerned with the neglect of the quality of the product. Accidents caused by inferior charging treasure occur frequently, ranging from "burning" bad phone serious and even cause an explosion caused a fire. So buy charging treasure when we must be careful not to buy inferior products, following the sale of shopping search to tell you about how to identify inferior charging treasure. First, do not mark USB port output current. In this case the product's USB port 0.5A output current may be two, electrical parameters marked wrong. For example mAh written mA, power behind the battery voltage is not marked, because there are 3.8V and 3.7V different batteries, the corresponding energy is different. Another argument is not marked label batteries voltage is very amateur approach. Three, exceeds the capacity of 8000mAh, USB output port current is still only 1A. Increasing the need to increase the capacity of mobile power batteries, increasing the need to increase the output current specification conversion circuit components. Even the cost of high-capacity mobile power accounted for less circuit components are reluctant to change big, hard look at the batteries they do not play tricks on. Fourth, the energy conversion efficiency is less than 75%. Energy efficiency is divided by the energy labeling of batteries (when common watt mark) with the actual release of energy, decent products in more than 82%. When you see a mobile power mobile power energy conversion efficiency of only 70% more, then there are two possibilities too bad, either element, the heat is high, heat loss and more; either the batteries energy vacuity, resulting in efficiency formula in the denominator becomes large. V. abnormally low prices. When you see a capacity of tens of thousands of mAh, the price is only tens of dollars do not buy mobile power, decent brand products never so cheap. 10000mAh Mobile power retail price minimum should be a hundred or so. (Want to buy formal charge treasure can be qualified for sale to the shopping search, www.sooeso.com search sale is the most professional global shopping search engine, domestic goods readily available, quality assurance) six, can not be loaded in accordance with the current nominal value . For example, the current label is 1A, only the actual maximum load current of 0.7A. In this case, and a 300-watt power supply is the same as the label affixed own 450-watt power supply nature, vacuity. Seven, three products. You will find a lot of products have not any of the above brand information, and no information on top of the packaging business, no name, no address, no trademark. Only when some simple common identity, generally do not choose this situation, neither security nor affordable. Shopping search Sale - sea convenient search Amoy net purchases by e www.sooeso.com search of people we co-founded and stable at high speed for sale search using the search e search search engine if you want to buy cheap goods, if you do not. know foreign shopping sites, you are welcome to use search of goods for sale search search e.