There is a fact that even an external battery's appearance looks good, its inside could be made of an innovative, inferior battery cells, which is very easy to cause quality problems. The battery cells burn up, battery swells, its cruising power is short and even a little bit of voltage instability would cause serious safety issues. In addition, the cheap copy companies are good at fabricating a fake scalar and even some external batteries of big brand are the same.
Next is the circuit board. An excellent circuit board could maximize the.External battery's performanc. Otherwise, high quality batteries can not avoid an accident. Meanwhile, the special and excellent circuit design can protect the cells and reduce energy losses, which maximize cells energy to convert into electrical energy.
Furthermore, the circuit board also influences the stability of voltage and current. For the charging instruments, charging voltage and the current are required for a long time stability to make charging faster and safer. Additionally, protections are indeed. Such as overload, over-current, over charge, over temperature and short circuit.
http://www.external-battery.net established in 2005, is the subsidiary company of Global Vision Group (HK) limited. It is a professional and famous power bank manufacturer and exporter in China. With its professional R&D center, factory and marketing team, we devoted ourselves to offering customer with innovative 3C products. In 2010, the smart phone and tablet (Iphone, Ipod, Ipad, Sumsung, Motorola, blackberry, Nokia...) developed tremendously.