Battery charge is not fixed, charge dissipates through the charge medium (acid, gel etc) but is concentrated around the plates. Monitoring devices read that charge and switch out. After several hours charge more fully dissipates from the plates through the medium, readings will drop around the plate and more charge can be applied. Try it with any car battery, you can always get more charge in once it's been left for a few hours.mcbutler wrote: ↑Fri Dec 08, 2017 2:07 pmSurely, once the battery is fully charged, it is fully charged, you cannot charge it higher than its max physical capacity.ph001 wrote: ↑Thu Dec 07, 2017 9:18 pm I don’t think it would do much harm in reality but the IBS is supposed to look at the recharge current so it knows the battery is fully charged. Take it all with a pinch if salt...I’m of the opinion that if the IBS is looking at live data anyway it will soon sort itself out once you start driving normally.
Why do we need a module to monitor something that is fixed? ...
Ctek conditioners run a very low current so charge 'soaks' through the medium very consistently, they also 'cycle' the charge by discharging slowly then re-charging, this will 'condition' the battery to accept more charge improving (or repairing) knackered batteries to some degree. Some models also have desulphurisation modes which will clear sulphur from lead-acid plates again restoring the battery. Theoretically a battery could have decades oflifeif it is maintained carefully (the one in my Z4 is the 2003 original always kept on a Ctek when not used for a week or more).