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      05-20-2019, 04:31 PM   #84
SD ///M4
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Drives: M4 Coupe | M3 | Z4M Roadster
Join Date: Jan 2011
Location: San Diego, CA

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Quote:
Originally Posted by FreeDarko View Post
Ok so I haven't used the car since January and didn't get a chance to hook it up to a charger either.

Should I hook it up first to a charger and let it run overnight before trying to start the car?
If you are going to use the CTEK Lithium US charger, and it doesn't appear to charge, use this procedure from their manual to ensure a complete charging cycle:
"Some Lithium-ion batteries have an on-board UVP (under voltage protection) that disconnects the battery to avoid it becoming too deeply discharged. This prohibits the CTEK charger from detecting that there’s a battery connected. To bypass this, the battery charger needs to open the UVP.

By pressing the RESET-button for 10 seconds, the charger opens the UVP. During this process, the charging STEP 7 is lit. Once the UVP has been opened and the battery is ready to be charged, the charger automatically starts the charging cycle."
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The Coupe: 2016 M4 | Sakhir Orange | Black Full Merino Leather | CF Trim | M-DCT | More | ED 5/13/16
The Sedan: 2018 M3 | San Marino Blue | Black Full Merino Leather | CF Trim | M-DCT | ZCP | ED 7/18/18
The Roadster: 2006 Z4 | Interlagos Blue | Black Extended Nappa Leather | Carbon Leather Trim | Purchased 7/19/12

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