【Adjustable Voltage】This USB power supply line converts 5V2A input to adjustable 1.5V/3V/4.5V output with 5W 3A capacity, perfectly replacing 1-3pcs 1.5V 3A LR03 batteries. No more hassle of matching specific battery counts
【Cost-Saving】Say goodbye to frequent battery replacements! This battery eliminator powers devices via USB charging adapter or power bank, cutting disposable battery costs and reducing environmental waste
【Wide Compatibility】Compatible with various LR03 battery-powered devices, including toys, hygrometers, small fans, remote controls, thermometers, household tools, and measuring instruments
【Dummy Battery】The green is fake battery, and 0V is used as conductors. Before use, the voltages must be adjusted. If the device use 1pc battery voltages to adjust to 1.5V, two batteries to adjust to 3V and install a green fake battery, three batteries to adjust to 4.5V and install two green fake batteries
【Easy Use】Important Note: Adjust voltage before use to match device needs (1 battery=1.5V, 2=3V, 3=4.5V). Plug-and-play design requires no complicated installation