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I changed a Costco battery for my E90 (2011, 328i) ,and I drove the car for 10 min to test it out without battery registering. But after 2 days, I could not start the car. I bought a trickle charger to maintain the battery full but still no luck to start the car. What could be the reason?
New battery: H7 (94R), 80Ah
Original one: 12V 90Ah 720A / 160RC 720 CCA (S: 61 21 7 604 820)
Thanks in advance.
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