With the removal of removable batteries from smartphones, the battery is completely built-in design, which also brings the era of universal charging to an end. Smart phone screens are getting larger and larger, and electricity is fast, which has spawned a charging treasure (mobile power supply) that supplies power to mobile phones.
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As a variant of the large battery, the threshold for the production of the charging treasure is actually relatively low, after all, it does not need too high technology, and it has a stable and safe output and input circuit scheme, procured third-party cells, and assembled shells can be listed.
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This has to say a charging speed problem. At the beginning, the power bank was used to charge smart phones. And smart phones from the beginning of a charging rate is 5v1A\/5v2.1A to now generally support 18W fast charge rate, or even higher.
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The charging bank also follows the upgrade function, which can support the output and input power of the fast charge protocol, matching the fast charge mode of the major brands of mobile phones. In this way, the charging bank can be divided into two categories because of the charging speed.
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The standard charging bank is this kind of maximum output power of 5V2.1A(10W)
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The fast charging bank can provide the minimum charging power of 18W or even higher for mobile phones that support matching fast charging