Night Optics Falcon 6x Gen 3 Gated Long-Range Night Vision Binocular - Manual (Page 33)

1-23
1-16 ELECTRONIC CIRCUIT FUNCTION
The electronic circuit (Figure 1-6) regulates the direct current
voltage from the batteries to the image intensifier and IR source as
required. It also monitors the output voltage of the batteries and
turns on a low-battery indicator in the right eyepiece when the
battery life remaining is approximately 30 minutes (2.4 Vdc).
Figure 1-6. Electrical Function Diagram.
a. Power Source. The electronic circuit is powered by
replaceable batteries – either a 3.0-volt lithium battery (BA-5567
/U), two AA 1.5-volt alkaline batteries, or two AA 1.5-volt lithium
L91 batteries.