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Old 05-29-2018, 10:51 AM
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Doug Huffman Doug Huffman is offline
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Location: Washington Island, Wisconsin, thru Death's Door
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Mein Auto: CPO2012 X5 35d M57(E70)
Originally Posted by itsrhadoo View Post
I have made at least 2 long roads so the battery supposedly must've charged back. Any ideas? Thanks!
Your BMW will NEVER EVER fully charge its battery, not if you ran it forever.

Buy a proper battery CHARGER and charge in accordance with your car’s owners manual and the CHARGERS manual. The first time be prepared to leave the charger on for 24 hours.

With a nominal 100 AH battery and a CHARGER for AGM batteries’ 4 amps MAXIMUM output it will take ~24 hours to recover a seriously depleted battery.
Scepticism and Animal Faith (1923)
Scepticism is the chastity of the intellect, and it is shameful to surrender it too soon or to the first comer: there is nobility in preserving it coolly and proudly through long youth, until at last, in the ripeness of instinct and discretion, it can be safely exchanged for fidelity and happiness.
(The Works of George Santayana p. 65)

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