Using Jump Start terminals for trickle charger?

[Senninha]

NZNick ,,, This is how I have mine set up too …

[NZNick]

I’m sure I copied it from someone here back in 2015-ish, possibly you!

[Old guy]

Without wishing to cause any unnecessary worries, the use of the CTEK MX5 seems to have killed my NSX's battery. It was working fine for several weeks - the string of LEDs showing progress illuminated and then changed as normal = all healthy. And then one day the string of LEDs was not lit.

Now, when disconnecting and reconnecting, the CTEK doesn't seem to think there's a battery attached.

I will investigate more this week.

How old was the battery? Maintenance free batteries (AGM or conventional) have the distressing characteristic of seeming to be just fine and then 15 minutes later suffering a massive MI and not being able to be revived. I have had occassion where I have driven a car someplace in the summer months, parked it and come out to a 100% dead car. No prior warning such as a slow starter motor or dimming headlights. When they fail in this manner they will not accept charge (the CTEK lights do not go through their progression).

Maintenance free batteries seem to have an operational life of about 6-8 years. If you have ever allowed the battery to go flat (headlights on / parasitic loads) this will skew towards a shorter life (much shorter if you do this frequently). I have had a Volvo 242 GT, Volvo 745 turbo, Honda Pilot and the NSX and they have all suffered from the 'it was fine 15 minutes ago' battery failure. The CTEK will help prevent the shortened battery life due to parasitic loads. On a car with a charging system that is in good order it will not materially extend the battery life.

Sometimes a dead battery is just a dead battery and not caused by anything other than the ageing process. At around 6-7 years I always start wondering 'should I change it pre-emptively or wait and get caught' . My current DD is an Audi A4 wagon and it actually monitors and stores current flow into and out of the battery and will give you a heads up when the battery is approaching its end of life - about 6-10 months before it goes completely dead if you choose to ignore the warning message every morning.

[goldtop]

Not sure how old my battery was. From memory, I did buy a new one a few years ago, but it's possible that was 6 years ago. And/or it's possible that lack of use contributed to premature failure. I did see that there was another old thread about a battery failing while 'maintained' by the CTEK: http://www.nsxcb.co.uk/showthread.ph...battery-advice

Anyway, I've ordered a new Yuasa today.