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                    Make sure that the battery compartment is always well ventilated when charging batteries. 
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                    Only charge batteries in the boat with the boat's own chargers. In other cases, remove the batteries from the boat. 
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                    Remember that the batteries discharge an explosive oxy-hydrogen gas at a voltage of 14.4 volts. - 
                            The voltage of a normal battery in unloaded status is 12.3-12.7V. 
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                            During charging, the voltage increases and the charging regulator stops the charging process automatically at a preset level. 
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                            The voltage measurement must be taken at the battery terminals, not the alternator, to achieve the correct result. 
 
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