12- to 32-volt vehicle battery as the primary
dc power source by using the charger as an
adapter as follows:
a. Connect the interconnecting cable between
the viewer and charger connector J1 (fig. 2-7).
b. Connect the red battery clip of the charger
to the positive (+) terminal and the black
battery clip to the negative (-) terminal of
the external battery.
graph 2-2.
a. Battery Protection in Extreme Cold. To
extend battery life when operating the viewer
at temperatures below -20 F (-29 C),
proceed as follows:
(1) If the viewer has been stored in cold
temperatures, the battery should be warmed
to room temperature. Do this by placing the
equipment in a warm area for several hours
before operation. Do not use an open flame to
warm the battery.
(2) During cold weather operation, fasten
the battery at the waist inside the outer cloth-
ing as close to the body as possible to keep the
battery warm.
b. Lens Frosting. Frosting and fogging of
