battery capacity NISSAN 300ZX 1984 Z31 Electrical System Workshop Manual

BATTERY
Full charging specific
gravity at 20°C
(68°F)
Check (Cont’d)
Converted specific
gravity at 20°C
(68°F)
1 26 I 120
I Recharging necessary I
BATTERY CAPACITY TEST
1 With battery connected to tester as shown,
turn load knob until
a draw of 3 times the
battery rating
is shown (Example Battery
rating
60AH Turn load to 180A draw )
Hold this draw for 15 seconds, then look at
voltage If voltage remains at 96 volts or
above,
THE BATTERY IS GOOD If voltage
drops below
96 volts, then proceed to next
test
2
THREE-MINUTE CHARGE TEST
1 Connect battery charger
2
3
Turn charger to a fast rate not over 40A
After three minutes, check voltmeter reading
If it is over 16 5 volts battery should be re-
placed
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BATTERY
CHARGING RATE AND SPECIFIC GRAVITY
OF BATTERY ELECTROLYTE
The relationship between the charged condition
of the battery and the specific gravity of battery
electrolyte differs,
as shown in figures below,
when the battery
is discharging and when it IS
being charged
Charging battery at a curreni 1/10 battery capacity
100 80 60 40 20 0
Charged rare (I" %J SEL8088
Chargtng battery at a curreni 116 of battery capacity
100 80 60 40 20 0
Charged rate (In %) SEL809B
As can be seen from these figures, the battery has
the following features
The specific gravity of battery electrolyte
increases very slowly while the battery is being
charged
The smaller the charging current, the slower
the specific gravity of the electrolyte increases
ling
WARNING:
a. Keep battery away from open flame while
it is being charged
b When connecting charger, connect leads
first, then
turn on charger. Do not turn on
charger first, as this may cause a spark.
c. Do not allow electrolyte temperature to go
over45"C (113°F).
CHARGING CURRENT AND TIME
REQUIRED
FOR CHARGING
Charge the battery at 1/10 the current of battery
capacity
Charging current I Time required
1/10 of battery capacity I Approx 8 - 10 hours
116 of battery capacity
(But not more than 10-ampere) Approx 4 - 5 hours ~~
~
CAUTION:
Do
not use more than 10-ampere current flow to
charge the battery quickly, as
this will shorten the
battery's service life.
-Service Data and Specifications -
Applied model Canada .
Ma,ntenance-free
Capacity V-AH I 1x0 j 12-70
1 126 I 128 Full charging specific gravi~y
at 2O'C 168°F)
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