Battery door pop up - Pulsar Apex XD50 Thermal Rifle Scope

I do not want to trash the scope, but I just mounted it on a 308. Shot once and screen went blank. No response. So I removed the batteries, re-installed them and scope turns on right away. I figured that 308 was to much, even though I read somewhere that 308 was the max recoil for this scope. So I put it on my AR15. Shot once from it and the very same thing. However, this time I noticed that the battery door was popped out. I'm hoping that the battery pack locks in better. A lot of money was spent on the sight to face such silly problems .