Sleeping battery discharge rate

[b_pappy]

Thank you for the great info here. I replaced my battery with an OEM & Battery Tender because I couldn't find an Optima to fit it. I'll look into these batteries next time I need one.
Bruce

[BoughtTheXLR]

For reference, the service manual tests for a parasitic drain on the battery list the normal full-off drain as 10-20 mA. The car is expected to switch to full off 20 minutes after being shut off and the last door closed.

That would work out to no more than 1 amp-hour per 50-100 hours of the car being fully asleep.

[Phrede]

Originally Posted by BoughtTheXLR

For reference, the service manual tests for a parasitic drain on the battery list the normal full-off drain as 10-20 mA. The car is expected to switch to full off 20 minutes after being shut off and the last door closed.

That would work out to no more than 1 amp-hour per 50-100 hours of the car being fully asleep.

Thanks for the info. I removed my Bluestar Bluetooth interface and the parasitic drain went to 22mA, pretty much normal for any car. 4 days later everything was still OK.

I am throwing the Bluestar in the trash and will recommend that everyone runs away from them.

IMHO, any vehicle put up for the winter needs a battery tender of some kind.

[b_pappy]

Well a few weeks ago the OEM battery was dead, so I sprung for red top Optima and put it on the Battery Tender. Last night I decided I would drive the car to charge the battery (and it's Friday so not everyone will see it). Anyhow, last night I unplugged the Tender, this morning it's deader than a door nail. I guess I have a draw somewhere.
I know I need to drive it more than I do, that's part of the problem.
I'll see what I can figure out this weekend.
Bruce