Textron Cessna Grand Caravan Ex 208B Pilot's Operating Handbook And Faa Approved Airplane Flight Manual page 834

SECTION 9 - SUPPLEMENTS CESSNA
SUPPLEMENT 15 MODEL 208B 867 SHP
GARMIN G1000
NICKEL CADMIUM (NiCAD) BATTERY
GENERAL
When the NiCAD battery is installed, a battery temperature monitoring
system is provided to detect an overheat condition of the battery
electrolyte. An amber BATTERY HOT annunciation indicates the
temperature within the battery is 140 - 160°F (60 - 71°C) and will
remain illuminated until the temperature drops below 115°F (46°C).
Once the temperature of the electrolyte exceeds 160°F (71°C), the
amber BATTERY HOT annunciation will go out and be replaced by a
red BATTERY OVHT annunciation. The red BATTERY OVHT
annunciation will remain on until the temperature drops below 46°C
(145°F) at which time the amber BATTERY HOT annunciation will
come back on. In either case, it is necessary to immediately stop
providing charging current to the battery from the airplane power
system. This is accomplished by turning the BATTERY Switch to OFF
and using the appropriate checklist procedures contained in this
supplement. During these procedures, BAT AMPS indication should be
used to verify that charging current has been reduced to zero (0).
A red BATTERY OVHT annunciation with temperatures above 160°F
(71°C) is considered critical and the flight should be terminated as soon
as practical.
An amber BATTERY HOT annunciation with temperatures of 140°F
(60°C) may become critical if the temperature and charging current
continue to rise.
Under high ambient temperature conditions, OAT above 100°F (38°C),
a battery temperature of 140°F (60°C) is not considered critical if a
decreasing charging current trend is verified and maintained by
monitoring the BAT AMPS indication.
OPERATING LIMITATIONS
There are no additional airplane operating limitations when the Nickel
Cadmium (NiCAD) battery is installed.
FAA APPROVED
208BPHCUS-S15-00
U.S.
S15-4