Guy's I have a 2012 825i that l still have the original battery in. The battery is still very STRONG. The killer of a lead acid battery is sulfur that builds upon the plates. If you look inside an older battery you can see this build up as a white scale on the gray plates. As the sulfur builds up the battery is less effective because the plate surface area is smaller. At some point, it'll kill the battery altogether.
I bought a battery charger that will remove that scale. I put it on each of my batteries once a year as a maintenance program. I have an older Optima battery that was weak and in cold weather didn't have enough power to reliably start my xterra. I put that battery on my charger/descaler and in 6 days it brought my battery back to a strong life. If the battery is a cheaper battery, it may not be brought back to life because the plates are too thin. But sulfur build up will still be a problem over the battery's life.
These can be had for about $150 on Amazon which is half the cost of my Bobcat's battery.
The one I have is BatteryMINDer Model 128CEC1: 12V 2/4/8 AMP Charger-Maintainer-Desulfator.
To me, it's a small investment when I have 11 batteries to take care of or replace.
I bought a battery charger that will remove that scale. I put it on each of my batteries once a year as a maintenance program. I have an older Optima battery that was weak and in cold weather didn't have enough power to reliably start my xterra. I put that battery on my charger/descaler and in 6 days it brought my battery back to a strong life. If the battery is a cheaper battery, it may not be brought back to life because the plates are too thin. But sulfur build up will still be a problem over the battery's life.
These can be had for about $150 on Amazon which is half the cost of my Bobcat's battery.
The one I have is BatteryMINDer Model 128CEC1: 12V 2/4/8 AMP Charger-Maintainer-Desulfator.
To me, it's a small investment when I have 11 batteries to take care of or replace.