Today I started using a couple 1100mAh Imist batteries from my last order and noticed I was hitting the cut off. I take long draws and usually hit the normal 10 second cut off from other batteries. The Imist batteries are the same 10 seconds not the 15 seconds that is described in the description. The 15 second cut off was one reason for buying them but not the main reason I like the gun black color and price.