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Old 11-06-2012, 08:04 AM   #3
StuartV
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Joined: Oct 2004
Location: Manassas, VA
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Check out the Optimate 4 Dual Program. It has a mode specifically for charging a BMW over the CANBUS. And a mode for charging regular batteries.

If you go with a Battery Tender, you might want to go with the Battery Tender Junior. It has a lower maximum current than the regular BT. The regular BT, can, under certain conditions, supply too much charging current and F up a gel battery.
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