The tailcap has what seems to be a brass cover over the spring mechanism which comes into contact with the battery when it’s inside. This is a nice feature which is especially important in flashlights which will be using rechargeable batteries like the 18650. I have had cases where this spring starts to scratch off the metal of the battery. In the PC25 I don’t have to worry about it. It’s also nice to see dual springs on either side of the battery. This gives it a nice amount of shock protection in case the flashlight were to be dropped, protecting both the flashlight and the batteries.
Jetbeam PC25 on far right