Features: Replace 4pcs LR6 AA + LR03 AAA battery power supply cord,This eliminates the need for 4pcs 1.5V LR03 AAA LR6 AA batteries,2in1 design,can powered 1 6V 4 AAA and 1 6V 4 AA devices at the same time. Suitable for 6V 4AA 4AAA Radio,electric toy, holiday LED lights,Clocks,luminara candles,Walkie talkie,Calculator,power remote controller, keyboard, Christmas advent calendar display,Walkman and more 4AA 4AAA Battery power supply devices,only suitable for 6V AA AAA devices,can not fit for other voltage devices. No Need To Change Battery Frequently: With this AA AAA battery eliminator USB cable,you don't need to buy a lot of replacement batteries when the batteries run out,saving you more time and money. Power supply from 5V 2A USB charger,power bank,car USB charger and more USB adapter,yellow dummy battery is AAA size,clear dummy battery is AA size. Some mobile power bank sources have an automatic power-off function, and the output current of 90mA will automatically power off. It is recommended to use wall USB Adapter. AAA AA Fake batteries cannot be used in parallel, only in series,Can not be mixed with a real AAA AA battery,Green dummy is fake battery(as conductor,no power ). Specifications: Color: Black Material: Plastic Power Cable length: 460cm/181.1inch input: DC 5V 2A output: DC 6V/0.5A Note: 1.Transition: 1cm=10mm=0.39inch 2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes: 1x USB to 6V AAA + AA Battery Eliminator Cord 3x AA dummy battery 3x AAA dummy battery