20pcs 3.7V 9V 5V 2A Adjustable Step Up 18650 Lithium Battery Charging Discharge Integrated Module

Feature: Input voltage: 4.5-8V Output voltage: continuous adjustable 4.3-27V (Counter clockwise to boost voltage) Charging voltage: 4.2V Charging current: up to 1A Discharge current: the maximum 2A Output reference maximum current: 5V 1.4A, 9V 0.8A, 12V 0.6A Quiescent current: about 0.5 mA Overshoot protection: Yes Over discharge protection: None (also can be said yes, because 2V cut-off boost but does not block the output, output has 2V) Deadline boost:: 2V, depending on whether added the additional protection board Size: 3.3 x 2.3 x 0.9cm Connecting example, VIN + connect 5V solar panel, BAT + terminal can output 4.2V to charging 3.7V 18650 battery, OUT + side can output an adjustable voltage Can be used for multimeter, modified lithium battery charging Package includes: 20 x Lithium Battery Charging Discharge Integrated Module