Hi Guys, newbie posting here, hopeful of getting some good advice!
I have a 2013 M5 Voyager with i-Stop. The main battery was recently fully discharged (0 Volts) due to the rear cabin light being left on. I jump started it and ran it for about 15 minutes. After charging the main battery is around 12.6V but overnight it drops to 12.25V.
This seems a bit low to me, so I'm considering removing the main battery and charging it with something like the Ring RSC612. The car normally does short runs and hasn't had a good long run since the discharge.
Although I wasn't unduly inconvenienced by the loss of ECU memory and other settings after the initial discharge, I would like to try maintaining 12.6V across the system while the main battery is removed.
And so to the question: is there any reason why I shouldn't jump the sub-battery across to the main battery leads to retain the ECU settings (plus central locking) ?
Sundry notes: Both main and sub-batteries were replaced 2.5 years ago by a main dealer, at a cost of £235. I would have expected at least 5 years use from the OEM Panasonic batteries. The sub-battery is in good shape, and keeps 12.6 Volts.
Thanks for any help you can offer!
I have a 2013 M5 Voyager with i-Stop. The main battery was recently fully discharged (0 Volts) due to the rear cabin light being left on. I jump started it and ran it for about 15 minutes. After charging the main battery is around 12.6V but overnight it drops to 12.25V.
This seems a bit low to me, so I'm considering removing the main battery and charging it with something like the Ring RSC612. The car normally does short runs and hasn't had a good long run since the discharge.
Although I wasn't unduly inconvenienced by the loss of ECU memory and other settings after the initial discharge, I would like to try maintaining 12.6V across the system while the main battery is removed.
And so to the question: is there any reason why I shouldn't jump the sub-battery across to the main battery leads to retain the ECU settings (plus central locking) ?
Sundry notes: Both main and sub-batteries were replaced 2.5 years ago by a main dealer, at a cost of £235. I would have expected at least 5 years use from the OEM Panasonic batteries. The sub-battery is in good shape, and keeps 12.6 Volts.
Thanks for any help you can offer!