Mobile power supply is a portable device that integrates power storage, voltage boost and charge management. The storage medium is generally lithium battery cell, because the lithium battery cell is relatively small, large capacity, wide market circulation, moderate price, and is widely used in digital products.
It works the same way as charging your phone. Connect to the 5V USB computer port or USB charger to charge the mobile power supply. Therefore, there must be a charge management system inside the mobile power supply. The charging management system can automatically adjust the charging current according to the voltage of the lithium battery. The process includes: pre-charge, constant voltage charge, and floating charge.