The so-called charging treasure is a portable mobile device that integrates power storage, voltage boost and charge management. The general storage medium is the use of lithium-ion batteries. Because the current lithium battery cell size is small and the capacity is large, the market circulation is also large.
In terms of price, it is widely used in digital products, and the operating voltage of lithium batteries is between 2.7-V4.2V. The voltage will decline with the decline in capacity, and the 2.7-4.2V voltage can not be directly charged to the mobile phone, because the voltage between the same potential can not be charged, so the mobile power to charge other digital products, you must increase their own voltage, only the voltage up to 5V so that you can charge digital products.
Such as mobile phones, MP4, MP5, tablet computers, etc., and then mobile power is not a one-time product, it can be used repeatedly hundreds of times, so after the mobile power is used up, we have to charge him, so that there is a need to have a charge management, charge management system can automatically adjust the charging current according to the battery voltage. The process is: pre-charge constant current charge constant voltage charge and floating charge and so on.
May use a different battery cell, ultra-thin with polymer batteries