Checking battery power, With high speed battery pack mb-21 – Nikon F4 User Manual
Page 25
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n
At temperatures around 20°C
(68°F), AA-type alkaline-manga
nese batteries give the highest
overall performance, including
faster advance rates and a greater
number of rolls of film. At lower
temperatures, however, the perfor
mance of alkaline-manganese
batteries deteriorates. For shooting
at low temperatures, it is advised
that you use NiCd batteries. (See
table on page 108).
J
CHECKING BATTERY POWER
With High Speed Battery Pack MB-21
If only one LED comes on, replace
batteries.
Push the battery check button.
If both LEDs light up, power is sufficient.
r
You can also check batteries by
contirming that the viewfinder LCD
is on, in the same manner as
when using the MB-20 (see
next page).
If neifher LED lights up, batteries are
exhausted or improperly loaded.
17