XT Battery Cap XT30 / XT60 / XT90 Cap

This is an XT30 / XT60 / XT90 Cap, it fits over the female side (battery side) of lipo batteries. It has a small lip on the bottom to make it easier to pull apart. Should fit snug.

I use these to determine if the battery is charged or not. When I use the battery I throw the cap in the bag. I throw used batteries in the bag after they are done and when I get home or I'm looking at the bottom of my lipo bag looking for charged batteries I know which ones are still good.