Which of the following is a characteristic of gel cell batteries compared to flooded cell batteries?

Gel cell batteries are known for their maintenance-free operation, which is a key characteristic that sets them apart from flooded cell batteries. Flooded cell batteries require regular maintenance, such as checking the water levels and adding distilled water, especially in hot climates or under heavy usage. In contrast, gel cell batteries are sealed and utilize a gelled electrolyte, which prevents electrolyte evaporation and eliminates the need for such routine maintenance.

Additionally, gel cell batteries are designed to be more spill-proof, which makes them safer and more user-friendly in various applications where maintenance might be a challenge. Their design helps them withstand deep cycling without significant degradation, further enhancing their appeal in scenarios where minimal upkeep is desired.