Vehicle Battery & Alternator Diagnostics

What is a common acceptable maximum parasitic current draw (quiescent current) on a modern vehicle after all onboard computers enter sleep mode?

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 Correct IncorrectUnder 50 milliamperes (0.050 A) is a common rule of thumb, with many vehicles lower. Higher draws can discharge a healthy car battery over extended parking.

What is a common acceptable maximum parasitic current draw (quiescent current) on a modern vehicle after all onboard computers enter sleep mode?

• 5 Amperes
• Under 50 milliamperes (0.050 A)
• 500 milliamperes
• Zero milliamperes exactly