Under the temperature of 68 ℉
(20 ℃ ), the specific gravity of the
electrolyte in the electrolytic cell
is 1.28 when measured with an
electrolyte hydrometer; if the
specific gravity is less than 1.24,
the battery needs to be charged
(note: please refer
to the comparison table of
temperature and electrolyte
density for the change of
ambient temperature);
For maintenance-free batteries,
in addition to measuring the
specific gravity of electrolyte, it is
necessary to check the color of
the charge state indicator lamp
(commonly known as
the electric eye) on the battery
(see the battery label for
instructions).
The wiper blade shall be
installed firmly and in a proper
position. The rubber part of the
wiper blade shall be free of
aging and missing. The wiper
blade can be hung and brushed
clean. If there is a problem,
replace the wiper blade.
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