Dead Battery after 5 Days Idle

D

DAG

Member
Hi Team. 2016 3.5i. 12,935 original miles. New battery installed Feb 21 at BMW dealer. Interstate AGM. I bought the car in March of 21. I live in Virginia and temp has been between 50 and 90 F for the last 3 months. The car sits in the garage during the week and sometimes weekends. After about 7 - 9 days I go to start it up and it needs a jump. No other issue other than that. I am taking battery back to Interstate today so they can test it. If that comes back OK, than what else is happening? Why do I need to jump it only after it sitting idle 7-9 days? Thanks in advance.
 
Is it an option to use a battery conditioner, my zed is hooked up whenever it’s not in use , to date I have no issues and my car sits for weeks , especially during the winter .
 
+1, a trickle charger hooked up under the bonnet/hood will sort that out.

Saying that a battery that’s a few months old should not be fully discharging in a week unless there’s a drain on it :thumbsdown:
 
You must have a circuit draining the battery..either something like a tracker / dash cam / after market blue tooth device..

There was an issue of some car’s Bluetooth module not allowing full shut down ..a software revision fixed that..

A fully battery charged battery should last at least 6 weeks then start ..
 
+1 trickle charger, esp for cars that have minimal use, stops some of them electrical gremlins moving in
 
Pbondar said:
You must have a circuit draining the battery..either something like a tracker / dash cam / after market blue tooth device..

There was an issue of some car’s Bluetooth module not allowing full shut down ..a software revision fixed that..

A fully battery charged battery should last at least 6 weeks then start ..
Click to expand...

:thumbsup:

As long as you are not in and out of the car waking the system. Let it go to sleep and wake it up when you want to drive it.
 
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