I put in a brand new battery in my night owl optics night vision monocular and the red light comes on but i can not see anything out of it.

Possibly buy a used model on eBay.

Example:

https://www.ebay.com/p/Night-Owl-Optics-Explorer-NOCX3-Night-Vision-Monocular/69805296

Night Owl Optics Explorer NOCX3 Night Vision Monocular eBay

First, what are the problems with your Night Owl monocular? I can't help you. You'll need to give more information on what is wrong with the Night Owl monocular. stewbison

There could be a number thing wrong with Night Owl NOCX3, broken wires, bad electronic components, inverter not work, image tube has gone kuput! With out trouble shooting this monoculars. I am taking a guess. stewbison

Hello, is the IR glowing red, don't look into the IR lens. Just place your hand in front of it and see the is a red glare on your had. If there is a red glare then IR is work.
Another thing when you taking a look see through the Night owl NV monocular there should be a green glow from the image intensifier tube, if not, then the NV monucular isn't working properly. stewbison

Hello Here Night Owl Optics owner manual web site for your monocular: http://www.nightowloptics.com/documents/NexGenMonoMULTImanual.pdf

One more thing. DO NOT LOOK THROUGH NV MONOCULAR DURING THE DAY, OR LOOK AT BRIGHT LIGHTS. This will destroy the image intensifier tube. Bright lights will make it go south faster than Speedy Roadrunner. I need parts if the image tube is gone. Night Owl Optics in El Paso, TX will charge you about $200 plus parts and shipping to repair it. So, listen no looky at bright lights in the neighbor bedroom window, hey. GB...stewbison

Hello, image intensifier tube is bad. Sorry. GB...stewbison

Hello, your Night Owl NOCC3 monocular needs a new image intensifier tube. It is cost prohibitive to have it fixed. Auction it on eBay as "night Vision Night Owl Parts only" GB...stewbison

Hi, did you push the IR button? Read the operator manual about looking directly into bright lights and trying to see thing during the day time. This a NO, NO. It made for night vision. stewbison

where can you get the battery cover for the battery on the NOCX3 night vision technology ?

dont power this up in full day light or you will burn out the ccd pick up if you cant see anything through it i gess the tude has burnt out
its common for this to happen there life span is only about 1000 hours and much less if exposed to bright light, ie minuets!