Hello David. David you night vision doesn't use any batteries that one installs. You have Kalinka Zenit NV monocular that is Russian manufactured but is sold by Night Vision Optics. Your night vision uses a piezo electric ignitor to charges the batteries and charge a couple capacitors.
The lever on top to the Zenit monocular is activated by squeezing the handle that is covered in a rubber type material. Just keep squeezing on the lever and in while things will start working. Best of Luck David. GB...stewbison
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