I have no idea. The dealer installed a BMW approved charger as part of the PDI (not sure of the brand) and it will trickle until the battery is near full, switch to "float" and then back to charge as necessary. There is a charge port with a spring loaded cover mounted under the front bumper. Our cars have AGM batteries if that helps.
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2013 535 X Drive, Alpine White/M Sport/Executive/Apps/Black Dakota/Fineline Anthracite
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