Type-C Charging Module TP4056 and 18650 Battery Box Set Lithium Battery Charger Module Input Voltage: 4.5V-5V Maximum Charging Current: 1000mA Charge Termination Voltage: 4.2V ± 1% Battery Over-Discharge Protection Voltage: 2.5V/3A Board Size: 28 x 17 x 4mm Made in China When connecting the battery for the first time, there may be no voltage output from the OUT terminal. You need to connect 5V to the power input and charge it slightly to activate the protection circuit. I confirmed that the LED lights up when I connect the power to Type-C and connect it to this module. However, I have not performed any further checks. This is a battery box for 18650 lithium-ion batteries. Size: Length 76mm, Width 21mm, Height 20mm A 69mm long battery (the blue battery in the photo) fits, but it's almost full. The wires are directly crimped to the terminals. Please check the photos. Batteries are not included, only the battery box. I have only checked the continuity of the terminals and wires with a tester, but I have not checked it with a battery inserted. I haven't checked it with a flat-top battery because I don't have one. Since it's exposed as is, I put it in an SD card case. Photo 8 Please understand the above before purchasing.