What will cause an individual battery cell to reverse polarity.

Correct Answer: Option C — When discharging the battery string if a cell becomes weaker than the remaining cells, the discharge current will effectively charge the weaker cell in reverse polarity.

Under USCG National Maritime Center examination standards, the accepted correct answer is: When discharging the battery string if a cell becomes weaker than the remaining cells, the discharge current will effectively charge the weaker cell in reverse polarity..