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Battery indicators are used widely in the industrial sector to determine the battery state of charge at a glance. They indicate when the battery is partially or fully charged or discharged by flashing different colour lights.
the indication is based on specific gravity, which is one of the most stable methods for indication of state of charge. These battery indicators provide temperature compensation i.E. They provide accurate readings regardless of what the battery temperature is.
these battery charge indicators also indicate low electrolyte level and reduce the need for open circuit voltage testing, thereby saving time.
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