Features: D is 1.5V,2D is 3V,3D is 4.5V,4D is 6V,Replace 1 to 4pcs LR20 D Size battery power supply cord,This eliminates the need for 1 to 4pcs 1.5V LR20 D Size batteries,if your device needs 1pc D battery,please choose D 1.5V version,if your device needs 3pcs D battery,please choose 3D 4.5V version,and so on. No Need To Change Battery Frequently: With this LR20 D Size battery eliminator USB cable,you don'for t need to buy a lot of replacement batteries when the batteries run out,saving you more for time and money. Power supply from USB charger,power bank,car charger and more USB adapter,with 5V 2A US plug USB power adapter,D battery eliminator to power your electronics. Best used on everyday applications such as flashlights, baby swings, baby cradles, radios, stereos, emergency lamps, electric candles, security lights, and much more. 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. Never change batteries again! This battery replacement allows you to supply practically any device that is only supplied by D batteries with a permanent power supply in the future. Save yourself the money for regular battery changes or for expensive rechargeable batteries, never again fret about a failed device because the batteries were discharged at the wrong moment. And the environment thanks you too. 3V with one dummy fake battery,4.5V with two dummy fake battery,6V with three dummy fake battery(as conductor,no power ) LR20 D Fake batteries cannot be used in parallel, only in series,Can not be mixed with a real LR20 D battery. Specifications: Color: Black Material: Plastic Power Cable length: 100cm//39.3inch US Plug adapter input: AC 100-240V 50-60Hz, USB output: 5V 2A LR20 D dummy battery output: for DC 1.5V/1.5A,3V/1.5A,4.5V/1.2A,6V/1A(optional) 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 D Size Battery Eliminator Cord 1x US plug USB power adapter