[redcoupe86]

I have an ‘86 turbo with a relatively new battery.

I hook my car up to a battery tender since I only drive a couple times a month.

Before I leave for a 15 min drive the tender says 100% charged.

Car running I get 13.86v at the battery on the VM.

I take my 15 min drive and when I hook the battery tender back up it says 83%.

Now in between shutting the car down and hooking up the tender the cooling fan runs for 30 seconds or so. Seems it wouldn’t drain the battery to 83%, right?

Also while car is at idle if I put the window down till it bottoms out that load causes the rpm to drop as long as I have my finger in the button.

Any thoughts?