Feature: AAA Size Placeholder Cylinder False Battery (4-pack),No Power,only as Conductor. Works as occupying the vacancy of battery compartment and conducting electricity,suitable for AAA Battery Eliminator and more. This is not a battery and fake battery ,it is a placeholder, the station is a resistor, there is no voltage, only the role of conduction, can not be charged, can not be used alone,Can only be used with lithium iron phosphate battery and lithium battery. How to use: If your product uses 2 AAA batteries, you can use one rechargeable 3.2V LiFePO4 battery plus one AAA fake battery to replace 2 AAA batteries. Specifications: Item Type: AAA Dummy Fake Battery Placeholder Material: PlasticandMetal AAA Size: 10x44mm Color: White,Red,Yellow Quantity: 1 Set(4pcs) Note: No retail package. Transition: 1cm=10mm=0.39inch Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package Includes: 4x AAA Dummy Fake Battery