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Quote:
Originally Posted by ABMW
If I were leaving it for 5-days in 10-degree or -10-degree temperatures, I would not expect it to start whatsoever. I would absolutely recommend a battery tender in this case.
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Seriously now, you think it is normal for a vehicle sitting unused in 10 degree temperatures to not start after five days of inactivity?
If that were the case, there would be thousands of cars not starting at the O'Hare airport parking each week in the Winter, and just imagine the Minneapolis airport parking lot.
If you really want, I can do the calculation of the specified maximum milliamp load for a locked X5 (40 milliamps after 60-70 minutes with TCU, 30 minutes without TCU) vs. the 90 Amp-Hour rating of the battery, adjusted for a temperature of 10 degrees and the normal self-discharge of an AGM battery over five days (1-3% per month).