Talk Morgan Forums Morgan Sports Cars Maintenance & Servicing Workshop Note: Immobiliser C.2016...........

Yes that would be surface charge, whereby the chemical composition that dictates a fully charged battery had not or could not be absorbed into the thickness of the plates. Think of it as a form of super charging.

It will leave the electrolyte closer to pure acid though which over time will errode the plates. That's why smart chargers drop to a float charge voltage when near full charge is sensed. Some ECU driven alternators with remote regulation offer this as well.

Putting the headlights on for a minute will quickly remove the surface charge.

It's a modern CTEK conditioner Richard. I don't leave it permanently connected, I let the battery cycle down a few days and then top it up overnight. My Roadster battery had managed 13 years when I replaced it last year.

I thought CTEK ran down the battery itself and then recharged it?

It has multiple features Bob.
That's one option I think.
The only thing it can't do is make tea.

Waste of space, then.

Not really, I have a tea maker in the house..........

Mrs W ?

Correct.....

Oooh John and Dave, My 2010 Roadster immobiliser lamp flashed whether the key is in or out. At least it goes out when the key is turned. Ah I just saw your bit about your Roadster Dave so all is well.

Hi Dave, just explaining why you saw the unusually high off load battery voltage shortly after charging. It would have bled down to 12.7 volts over time anyway.