View Bmw 5 Series Battery Jump Start Gif. Getting started prepare for the repair. So now you don't need to jump start your car or somebody else's car from the battery in the trunk.
You might get away with it, but i would go for safe and get a 12v jump start from a different vehicle. Now the old battery is not charging. Alongside getting your battery jump started, the air compressor is also in place.
Most car battery jump starters and battery chargers offer some flexibility, but some portable car jump starter options are more limited in what you can do with them.
The next day when i went to start the car, the horn went off again, brought it to bmw. Do you really want to connect a charged 24v battery to a discharged 12v battery, even for a short period? Should i jump start, or take it off and recharge? Remember, lithium batteries will die if left unused for an extended period.