A Better Battery for 599

George- Sounds like you have an electrical leak. Should be 40 ma or less leakage. Have your tech check and see if there is one. While he is at it, check and make sure the ground cable and battery cables/clamps are secure.

 

Taz is probably right from what you describe. I often let my car sit up to a week without a charger and have no ill effects. Oddly, I recently parked my car for 2 days and the battery was flat. I recharged the battery and it is holding for a week now just like before. I must conclude that I left on a light somewhere, didn't close the drivers door fully so the F1 pump ran occasionally, or some such thing. I guess my point is that there are some other possible causes but you will have to look into it.

 

Also, you’ll kill a battery by keeping it on charge all the time- will dry it out. That is unless you’re using a “smart” charger that cuts in and out as needed.

 

I discovered my passenger courtesy light switch was faulty and remained ON all the time.
Check that too.

 

It is. No issue with leaving it connected...

 

Thanks Fernando. I will check that out.

 

I have also just put a new battery in. I went for the Bosch S5 A13 given the advice of 360Marnix. Interestingly while sitting there running the car, I noticed the heated seat getting warm! However, the switch was definitely in the “0” position and I even turned it on and then switched it back to “0” again. Not sure what that issue might be but hopefully when the ignition is off the seat isn’t powered and therefore isn’t draining the battery.... it does mean a hot backside until the issue is fixed though!