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BATTERY REMOVAL / INSTALLATION
See Chapter 2 "Maintenance" for battery service
procedures.
CONVENTIONAL BATTERY TESTING
Whenever a service complaint is related to either the
starting or charging systems, the battery should be
checked first.
Perform the battery tests to determine its condition.
OCV - OPEN CIRCUIT VOLTAGE TEST
Battery voltage should be checked with a digital
multimeter. Readings of 12.6 volts or less require further
battery testing and charging. See the following chart.
NOTICE
Lead-acid batteries should be kept at or near a full
charge as possible. Electrolyte level should be kept
between the low and full marks. If the battery is stored
or used in a partially charged condition, or with low
electrolyte levels, hard crystal sulfation will form on the
plates, reducing the efficiency and service life of the
battery.
OPEN CIRCUIT VOLTAGE
State of Charge
100% Charged
75% Charged
50% Charged
25% Charged
0% Charged
9850043 R01 - 2017-2021 RANGER 500 / 570 Service Manual
© Copyright Polaris Inc.
VOLTAGE DROP TEST
The Voltage Drop Test is used to test for bad
connections. When performing the test, you are testing
the amount of voltage drop through the connection. A
poor or corroded connection will appear as a high
voltage reading. Voltage shown on the meter when
testing connections should not exceed .1 VDC per
connection or component.
To perform the test, place the meter on DC volts and
place the meter leads across the connection to be tested.
SPECIFIC GRAVITY TEST
A tool such as a Battery Hydrometer (PN 2870836) can
be used to measure electrolyte strength or specific
gravity. As the battery goes through the charge/
discharge cycle, the electrolyte goes from a heavy (more
acidic) state at full charge to a light (more water) state
when discharged. The hydrometer can measure state of
charge and differences between cells in a multi-cell
battery. Readings of 1.270 or greater should be observed
in a fully charged battery. Differences of more than .025
between the lowest and highest cell readings indicate a
need to replace the battery.
YuMicron™ Type
SPECIFIC GRAVITY
12.70 V
State of Charge*
12.50 V
100% Charged
12.20 V
75% Charged
12.0 V
50% Charged
11.9 V or less
25% Charged
ELECTRICAL
Voltage should not exceed
0.1 DC volts per connection
YuMicron™ Type
1.275
1.225
1.175
1.135
12
12.31
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