Battery Energizer or OEM BMW

Now I stick to Energizer Max batteries, they claim a 10 year shelf life, and I have some that are 5 years old that are still near 100% state of charge, with no leaks.

I had an Energizer battery last 13 years in my ranger. Problem was when it came time to change it I couldn't find them anywhere.

Bought my Energizer back in 2013, haven’t let me down once :)

For about a month I have owned a 2016 REx whose 60 Ah battery is supposed to get 72 miles. This week I fully charged it and have been commuting four four days without topping up. Today the REx kicked in with the trip meter at 73.3 miles. This was a mixture of city traffic jams and short bursts on the carriageway, mostly with the air con on and mostly in Comfort mode. So I'm pretty pleased.

I am still on my original battery in my 2007 335i w/ 87k miles.

my only option for a "proper" battery was a red top at $150.00. The next best thing was a group 47 Energizer, 590 CCA, 3 year full replacement, 7 year warranty from Sams Club for $65.00. I just dropped a load on the clutch and I don't plan on keeping the car for more than another 3 years. I only use synthetic oil so it cranks easier in the winter anyway. SO I got the energizer.