This video reviews fully the XY-SEP4 Buck-Boost convert module with Display that has Power, Energy, Current, Input/Output Voltage Display. All features are shown and tested. Charging battery is shown.
04:00 Hardware Explained
07:40 Datasheet viewed
18:48 Setting Constant current
21:16 Setting Current limit
23:02 Tests
34:24 Test: Input 24V
38:52 Test: Input 12V
41:35 Test: Input 5V
43:01 Charging lithium battery
47:45Two of this SEP4 module died
49:40 Potentiometer broke