3.7V Liter 9V 5V Multimeter Modified 18650 Lithium Battery Charge Boost Discharge Integrated Adjustable Module 2A

1,Up to 1 a programmable linear charging current for a single 3.7V lithium battery, fully charged with 4.2V.
2,Constant current / constant voltage charging, with over temperature protection.
3,Soft start to limit surge current, with battery reverse connection protection.
4,Low power standby, extended battery life
charging status dual output, no battery and fault status display.
5,Can 0V activation and 2.9v trickle charging
6,Working temperature: - 40 ~ 80 ° C
7,Input voltage range: 4.2V ~ 6.5V
8,Output voltage: 4.2v-28v (adjustable)
9,Maximum power: 5W