Battery current when parked?

[Michael Bunce]

Can anyone tell me how much current is drawn when the car is parked? I know that the alarm system needs to be on, but are there other systems stealing battery power? I now only use my car once a week and am receiving low battery warnings although it starts robustly.

[Big John]

Hi Michael

When the car is locked battery draw should be a few milliamps. Occasionalyl you may get an error in one or more of the modules so that the computers fail to go to sleep properly and continue to draw current. As soon as you unlock the car all of the computer modules wake-up and the car is then drawing maybe 20 Amps. This is why you will quickly get a warning if you sit in the car listening to the radio without the engine running. Personally I would want to be using it more than once a week and that use would need to be a good hour run. Otherwise it probabaly would benefit from a trickle charger such as a CTek when left parked.

Good luck

John

[Wrinkly]

2 hours ago, Big John said:

Hi Michael

When the car is locked battery draw should be a few milliamps. Occasionalyl you may get an error in one or more of the modules so that the computers fail to go to sleep properly and continue to draw current. As soon as you unlock the car all of the computer modules wake-up and the car is then drawing maybe 20 Amps. This is why you will quickly get a warning if you sit in the car listening to the radio without the engine running. Personally I would want to be using it more than once a week and that use would need to be a good hour run. Otherwise it probabaly would benefit from a trickle charger such as a CTek when left parked.

Good luck

John

There are some good videos on You Tube explaining how to identify / trace Parasitic electrical losses on the car.

Good Luck and Best Wishes , John

[Jimbov8]

This may help,

[Michael Bunce]

Thank you all. Most helpful. I think it's time for a new battery. I've been putting it off but it is the ORIGINAL JLR battery (now 5 years old!)