Skip the auto shop - Our mechanics make house calls

Q: Milliamps acceptable for parasitic battery drain

asked by on

What is the most milliamps parasitic drain acceptable for battery when the vehicle is off? I measured 30 milliamps. It seemed okay to me.

A: Yes, that’s okay. Now, realize that depends...

Yes, that’s okay. Now, realize that depends on a car these days. Because some of these Mercedes, Audis, BMWs, they are running so much stuff, with GPS and satellite navigation and all kinds of other features.

Some of those are running 65-70 milliamps normally. But, on most cars, the accepted range is up to 50 milliamps. You are well below that, so you are at the acceptable level.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Parasitic load on battery.

Cars basically use the battery at start up. Once the vehicle is running the alternator takes over and provides the car with the electricity it needs to run. If the alternator stops producing the electricity the car needs, the car...

Q: Has new alternator, new battery when started , motor dies when battery is disconnected...my mechanics are stumped on this

Hello. If replacing those particular components did not correct the issue then the next thing I would look at is the vehicle's voltage regulator. It appears that this engine's electrical system is equipped with an external voltage regulator that functions,...

Q: My car is not starting and does not make any noises while attempting to start

Hello there. A few problems can cause the vehicle to have a crank no start and they are all electrical. The most likely cause of the vehicle not starting is the battery. After the battery, the starter,...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...