Battery OPTIMA or OEM BMW

I have a pair of Optimas (older) and they're dead-ass solid.

They’re pricey but I’ve always sworn by Optimas

General consensus is that the yellow top optima battery is best. Also, the optima is the only aftermarket battery that has the vent hole in the same place as the OEM battery.

I found my first optima red top. It was dead when I found it. I just happened to have an agm battery charger/restorer. It took three days of sitting on the machine reconditioning, and then a day or so of charging afterwards. It held a charge forever. It was made in 05 or something like that, and it ran great until this year. I have since replaced it with a new one, and it works great as well.

I have an optima red top 34/78. Its incredible. Been almost 3 years in and no matter how much I throw at it on the trails I dont get dead cells. The individual gel cells are less perceptible to shake damage from rough terrain.

I’ve got yellow top optima. Hasn’t failed me yet :)

I put that same Optima in 6 years ago (to the month!). Mines still fine knock on wood

Used redtops for years. Had a couple go bad, but 3 year free replacement warranty solved that.

Optima isn't nearly as good as it used to be. I've owned a lot of their dry cell batteries and they've gone to **** over the years. They don't hold up well to this kind of use, and if they drop below 11V they **** the bed.

Once Johnson Controls bought them, they've become worse and worse.