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      12-15-2020, 11:22 AM   #12
MBM340
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Drives: 2021 M340 RWD
Join Date: Nov 2020
Location: USA

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2021 BMW M340i  [0.00]
Quote:
Originally Posted by Mr. Li View Post
car with mild hybrids still have AGM battery at the trunk, mild hybrids get an extra Li-Ion battery at the engine bay
This is correct. I have confirmed it is an AGM battery and you can charge it or use a battery maintainance device in AGM mode just like you would with other cars, but I will say when I hook mine up every 10 minutes or so the car is making electronic sounds from under the hood. Not sure what that is about but no harm appears to be done. I haven't left it on for more than an hour...

Anyone know what the car is doing?
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