Function and purpose - This device can be used with a multimeter and also serves as a converter to charge lithium batteries. - It provides a practical solution for powering measurement work while enabling Li-ion charging from a 5V source. Input and output details - Input: VIN+ port accepts 5V input, for example from a solar panel or other 5V source. - Output: BAT+ port provides a charging voltage in the range of 4.2V to 3.7V, suitable for charging an 18650 lithium battery. Key benefits - Versatile usage: supports both measurement equipment (multimeter) and Li-ion battery charging in one compact interface. - Solar-ready: compatible with 5V solar panel input for off-grid charging and field measurements. - Targeted charging output: delivers charging voltage appropriate for 18650 Li-ion cells. Compatibility and performance - Compatible with standard 5V input sources and 18650 lithium batteries. - Output range 4.2V to 3.7V is designed to support Li-ion charging needs for common 18650 cells. Use scenarios - Scenario 1: In a workshop, connect a 5V source (such as a small solar panel or USB-based supply) to VIN+ to power a multimeter and use BAT+ to charge a spare 18650 cell. - Scenario 2: In the field, use a 5V solar panel to feed VIN+, while BAT+ provides charging voltage to an 18650 battery, enabling portable measurement work with a ready-to-use battery. - Scenario 3: In a simple electronics project, supply 5V to VIN+ from a USB power source and draw charging voltage from BAT+ to replenish an 18650 cell for small handheld devices. Notes - The description specifies VIN+ for 5V input and BAT+ for 4.2V to 3.7V output to charge an 18650 battery. - No additional specifications, sizes, or materials are provided beyond these details.