Charging the smaller battery via cigarette lighter
Hi!
You may be right that the smaller battery is normally only charged while the engine is running. If we assume that the smaller one is connected to the cigarette lighter I would need to have two chargers to charge both batteries at the same time. And I would also need to have a cigarette lighter plug type of connector for my charger. I have now CTEK charger which should have all the necessary safety measures but I'm missing the right type of connector plug.
I have also noticed that the cigarette lighter is always connected to a battery (to a smaller one only?) i.e. even though the car key is in off position. I'm not sure if this is so in all cars?
Further, I would still like to hear thoughts of what type of batteries I could choose because my car is out of traffic for long periods and I would think that AGM batteries would work better in my case. However, it's not necessary easy to find mechanically right size batteries. I have heard that some battery manufacturers provide "fitting pads" to fit their batteries to various makes/models.
Brgds,
Antti
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