2011 BMW X5 Support Question
2011 BMW X5 Support Question
Find answers below for this question about 2011 BMW X5.Question posted by terri23364 on December 17th, 2015
What Is Bmw's Definition Of A Failed Battery?
Our 2011 x5 won't hold a charge for more than a few starts. When we contacted the dealership, they say it is not a failed battery and they won't replace it under the warranty even though the problem first started while the vehicle was under warranty. Thanks for any information.
Current Answers
Answer #1: Posted by waelsaidani1 on December 28th, 2015 12:47 AM
waelsaidani1
Member since:
May 12th, 2013 Points: 19,501,787
Member since:
May 12th, 2013 Points: 19,501,787
A common cause of battery failure is acid stratification. The electrolyte on a stratified battery concentrates on the bottom, causing the upper half of the cell to be acid poor. This effect is similar to a cup of coffee in which the sugar collects on the bottom when the waitress forgets to bring the stirring spoon. Batteries tend to stratify if kept at low charge (below 80%) and never have the opportunity to receive a full charge. Short distance driving while running windshield wiper and electric heaters contributes to this. Acid stratification reduces the overall performance of the battery.
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