I am currently running a 35 amp efest on my ipv v2. I am using it on a zenith clone built to 1.3 ohms. When I hit this device, the battery reading will go down to nothing left but it will still fire. After I let up on the button, the battery goes back to normal. And I can only hit it at 50w for about 2-3 seconds without it saying check battery. Don't kno if this is normal or not. Any help would be great!