Hi everyone. Just seeing whether anyone has had the same problem as I'm having with my IPv4. I have been running the plume veil with a 0.35 build and a zephyr budda with a 0.3 build no problems for a couple months on my IPv4 now and yesterday the IPv4 keeps telling me check battery with both these rdas after a couple seconds of pressing the fire button. But it runs fine on my kanger tech sub tank mini with no issues just with the rdas it tells me check battery. Any advice help will be greatly appreciated?