Metal Contact:AAA to AA Adapter Convert the AAA Battery to the Standard AA Battery Size, the Bottom of the Adapter is Sealed with the Metal,Which Makes Sure the Good Contact with the Negative Side

High Quality:AAA to AA Battery Adapter Made of More Flexible Environmental PP Material. Large Strength and Strong Toughness, No Longer Cracking, Greatly Increased the Service Life.

Slot Designed: AAA to AA Battery Converter Holder Designed with Battery Limit Slot, Can Fix the Battery in a Good Place.

AAA to AA Battery Converter:The Negative Electrode of the AAA Battery is Directly Exposed;The Positive Electrode Adopts the Lengthened Pure Coppered Nickel Anode Cap, Compatible With the Appliance With Deeper Anode Slot;and the Contact Resistance is Greatly Reduced by Increasing the Contact Part Between the Inside of the Adapter Barrel and the Battery

Easy to Install:Nothing Complicated, Just Stick the AAA Battery and AA Battery in the Converter. AAA Battery Can Replace AA Battery to Use.