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This is a DC charging and discharging integrated module, with 5V normally open output, which is not affected by load access and has a maximum load current of 2A. It features 4 levels of charge/discharge electricity indication and button-controlled output. The module comes with a built-in power management circuit that boosts a lithium battery to 5V and supports charging and discharging simultaneously. Besides, it has battery protection which makes it applicable for batteries without a protective board.
This tiny board is all you need to use a 3.7V Lithium battery. It charges as well as steps the battery up to 5V with up to 2A to power equipment like microprocessors and sensors. In addition to safely charging a lithium battery the module also provides the necessary protection required by lithium batteries. This module switches off when there is no load being drawn from it.
Pin Out For Charging and Discharging.
5V 2A Charge and Discharge Boost Module 3.7V/4.2V Specification
5V 2A Charge and Discharge Boost Module 3.7V/4.2V Pin Description: