Which maintenance task should be performed regularly on aircraft batteries?

Checking the electrolyte levels and connections for corrosion is a crucial maintenance task for aircraft batteries. Ensuring that electrolyte levels are appropriate helps maintain the battery's charge capacity and performance. Low electrolyte levels can lead to reduced battery life or even failure, which may result in malfunctioning electrical systems during flight.

Additionally, inspecting the battery connections for corrosion is essential, as corrosion can impede electrical flow and reduce the efficiency of the battery. Corroded connections may also lead to overheating and potential safety hazards. Regular checks and maintenance of these aspects contribute to the overall reliability and safety of the aircraft systems that depend on the battery. Therefore, this task is fundamental in preventing unexpected battery failures and ensuring that safety standards are met in aircraft operations.