Explains: What are the core parts of a rechargeable battery?

Only Readily gives you an explanation of the core components of a rechargeable battery, there are two main parts, one is the medium for storing power and the other is the medium for converting other energy into power. So the core of the good or bad can be used as one of the important criteria to measure the quality of mobile power.  

Charger manufacturers commonly used battery cells are polymer lithium, 18650 lithium, AAA NiMH battery three.  Polymer battery: standard voltage 3.7 V, more shapes, can be customized, large capacity, charging kuai speed, good value for money, wide range of applications, such as: mobile phones, MP4, portable speakers.  

18650 lithium battery: standard voltage 3.7 V, with small size, large capacity, standard voltage 3.7 V, mainly used in high-end products such as laptops.  AAA NiMH battery: standard voltage 1.2V . The capacity is relatively small. Should be widely, household appliances, players' etc.  

Polymer Li-ion cell batteries are more expensive compared to ordinary Li-ion cell batteries. However, the advantages of high-capacity lithium polymer batteries with high capacity and small size make it gradually replace ordinary lithium batteries.  

According to the national standards for batteries, mobile power manufacturers have a strict grading system especially for polymer batteries, dividing the quality and timeliness of the batteries into three grades - A-electric B-electric and C-electric. A-electric - brand new polymer batteries, B-electric --A - brand new polymer batteries, B - batteries that have been in stock for more than three months or are dismantled, and C - used batteries. Note in particular that C-cells are cheap but have serious quality issues, B-cells are first to cheap but decline very quickly. When finances allow, please buy A-cell mobile power.