What condition associated with a lead-acid battery cell can cause the plates to partially short-out and cause the cell to fail to hold a charge.

Correct Answer: Option B — accumulation of sediment within the cells due to excessive overcharging and discharging

Excessive overcharging and deep discharging shed active material from the positive plates. This sediment accumulates in the bottom of the battery jar until it bridges the plate bottoms, creating an internal partial short-circuit that prevents the cell from maintaining its rated state of charge.