12
It looks to me as the battery has been boiled, meaning the alternator overcharged it. This has several implications:
If the alternator overcharged it, then it will do so again. If this is the case, you need to have the alternator tested to ensure the internal regulator is fully functioning. Overcharging is as bad (or worse) than undercharging. You can do a ...
4
Looks like the green eye is leaking a tiny amount of electrolyte and the liquid layer on the battery collects dust. (Those green indicators are almost pointless, but they probably sell the batteries better.)
The leak is minor and probably won't affect the battery performance.
It is, however, probably enough to cause accelerated corrosion of the battery ...
3
All looks very dry.
Remove, clean and put some grease or petroleum jelly on the terminals.
Otherwise looks very dusty.
3
When a Battery is disconnected from a running engine, there is a milliseconds high voltage spike that occurs the instant the terminal leaves the battery connector. Some researchers say it can be as much as 150v in your vehicles 12v circuitry. Remember that ECU operating voltage is 5v.
A customer brought a car to me with all the lamps blown.
I asked him what ...
2
Get a trickle charger. Easy to install, cheap to buy and to use, just need an electric outlet or very long extension cord. Any auto store or Target or Walmart normally have one.
1
Battery tenders convert AC to DC electricity in order to charge the battery, this creates waste heat which needs to be vented to the environment, which is why there will be air holes or slits on the side or top of the tender. If you seal the tender or charger in an enclosure it will overheat and either break or a fail-safe mechanism will cut it off, this is ...
1
In short - is it the revs or simply the duration that is going to do the job? Will it charge 'better' at high revs or am I just wasting fuel for nothing?
Mostly, for cars with a reasonable alternator, it's the duration. Although the alternator will produce more power at high revs, if you don't turn on all the electrical accessories, the power produced at ...
1
4 is the only option, many times I have advised clients that a minimum of 10 or 15 minutes at around 2000 to 2500rpm is needed just to put the starting energy back into the battery and that is without having wipers, headlights rear window heater etc
So you need to give it a good run once a week making sure that you minimise electrical use. If you can’t then ...
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