Well as winter was approaching, and the frequency of me finding the car battery too low to start the car was becoming predictably boring, and as my daughter, who's car it is, is coming home from KL for Christmas and will be using the car a lot for 14 days, I took the plunge and bought a CTEK battery tester-charger - this action was really for two reasons, my Audi S4 lies sleeping in the garage too much as we can use wife's new Polo for short runs, so this CTEK battery charger was really bought to keep its battery "happy" - and the tester function was added to check the
Ibiza battery. So, charged
Ibiza battery off the car using the CTEK tester-charger and used the "reconditioner" function, after a day the battery seemed to have come back up to full charge okay, left it off the car overnight, checked its "status" the next morning using the CTEK charger - it still looked fully charged. Refitted it to the car and left it for four hours, then with the CTEK tester-charger connected to the battery and in "start test" mode, I started the
Ibiza, this resulted in the CTEK tester-charger powering down, probably due to the
Ibiza battery voltage dropping too low! So, it looked like this battery is not too good, I repeated this check after using the
Ibiza, ie restarting it with a hot engine and hopefully "full" battery - same result! I checked this CTEK tester-charger "start test" function on wife's Polo - it passed easily, so this tester can be believed. So, went to Costco and bought a new Bosch S4005 battery, made sure that it was fully charged by charging it overnight using the CTEK charger - then fitted it to the
Ibiza next day, left it four hours, fitted CTEK tester to it and started the
Ibiza - it passed this test easily. Used the car for a reasonable journey length, then left it for a week, used it again this past Tuesday, it started okay, so leaving it this time for longer if weather permits (this car does not have winter tyres, both other cars have - so not intending to use it in adverse conditions if not really necessary) .
Initial thoughts are that that battery was running out of life but a software reflash might be needed - that will wait until next year after which it might have let us down again, though it will not have let us down badly as we have another two cars to work with!
One other thing, if I did own an analogue voltmeter, I would not needed to buy a CTEK with a test function, so would have bought a more basic charger only type of CTEK, so now I feel that I should really get down to Maplin and buy an analogue meter while they are still on sale!