Glad I saw your advice on this - I've had electrical problems in other vehicles, 3 in the same car actually and the battery was one of them. It was fustrating to say the least to sort it out. Sticking with OEM battery for the X is really good advice from the sound of it.
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Originally Posted by weasel56
And be careful with non-oem batteries!!!!!!!! The DME engine computer controls the charge level output from the alternator and is precisely programmed to work with the OEM battery, which is designed for the HEAVY electrical load the vehicle has. If a non-oem battery is to be used, it can NOT be venting in the vehicle, HAS to be a maintenance free design, HAS to be the same build design and materials. (there are 3 different styles, lead acid, lead calcium, agm) It has to not only match the CCA, but ALSO match the RC (reserve capacity) and AH (amp hour) ratings as well. And the AH and RC are just as, if not more important than the CCA. Otherwise you will be going through batteries at very shortened intervals, and at risk of other electrical side affects, like the vehicle cutting loads because the lower capacity for loads.
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