Description:

• On board TP4056 lithium battery charging chip
• On board micro USB port, can connect chargers of most smartphones to provide charge for lithium battery
• With reserved IN+ and IN- input port for DIY
• With charging indicator
• Support charging and discharging over-current protection
• With constant current and constant voltage, will auto stop if fully charged
• Supports charging and discharging at the same time
• It can be used for voltage 3.6 3.7V, etc. 18650, polymer and other lithium battery charge and discharge protection.
• Input voltage: 5V
• Charging cut-off voltage: 4.2V ± 1%
• Maximum charge current: 1000mA
• Battery over-discharge protection voltage: 2.5V
• Battery overcurrent protection current: 3A
• Board size : 17.16 mm x 26.17 mm

usage method:

• Input voltage can be input through the USB or IN+, IN- , IN+ voltage positive, IN- negative electrode.
• D1 is full of electric light, green LED
• OUT+, OUT- connected to the load, the interface does not support charging and discharging over current protection.
• VBAT+, VBAT- lithium battery charging, VBAT+ connect the positive electrode of the lithium battery, VBAT- connect the anode of the lithium battery. When charging the red LED D2 light up, green LED D1 goes out. Positive and negative can not be reversed.
• The best charging current is 0.37 times of the battery capacity, for example, the battery capacity is 1000mAH, the charging current is 400mA

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