Formation of white crystals of potassium carbonate on a properly serviced Ni-cd battery indicates
- over charged.
- full charged.
- under charged.
Explanation
White potassium-carbonate crystals form when the electrolyte is forced out through the vent and reacts with carbon dioxide in the air, which on a serviceable Ni-Cd cell signals overcharging driving violent gassing. A correctly charged cell stays clean, and an undercharged cell simply lacks capacity rather than spewing electrolyte.
vale asking:
why old batteries wich were too much discharged produce white crystas?
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