We can use to capacity and how much? The average output voltage of more than a single lithium battery of 3.7V or 3.8V (lithium cobalt oxide / LiCoO2 or lithium manganese oxide / LiMn2O4), excluding the conversion loss of mobile power supply manufacturers, a nominal capacity of mobile power conversion 5000mAh / 3.7V 5.0 V output (USB standard voltage) when only 3700mAh mobile power magic bubble, if you press the 80% efficiency to count, only 2960mAh capacity available! Polymer batteries polymer batteries are divided into three qualities, namely product A, B goods, C product A product polymer batteries is the best quality new polymer battery, battery manufacturers are usually custom-made on quality requirements are relatively high, all parameters can compliance, without any unusual products. Under normal circumstances the big manufacturers of mobile power will use A product batteries. B product polymer batteries such batteries in the production process, for some reason, some products can cause flaws in appearance, capacity, voltage, or other parameters have a little problem, so the product is called B goods. Also, if A product batteries stock for too long, such as 3-6 months without shipping the product, usually also called B goods. B products 1-2 months of use of the previous product with almost no difference A mobile power, capacity, and a sharp decline in the number of cycles will be two months later. C product polymer batteries like 18650 disassemble products, usually discarded batteries mobile power customized gifts, the quality is poor, usually in appearance, capacity, voltage and other indicators are substandard. Such products there are security risks, has the power to move its production capacity not only on the problems, is likely to cause damage to the digital devices. Consumers also need to be wary of buying. Mobile power molipw | Mobile Power | Shuo Shuo provide by Shenzhen New Energy Co., Ltd. Shenzhen Shuo New Energy Co., Ltd. (www.molipow.com/page-about.html) strong, credible, in Shenzhen, Guangdong phone's battery industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will be able to lead the Master into the brilliant and you work for a better future!