The battery in my Acura was disconnected while I was gone for 3 months. In a VERY hot garage. The tester shows a 60% SOC.
Given that I'm in no rush, should I charge it at 2A or 12A?
The battery in my Acura was disconnected while I was gone for 3 months. In a VERY hot garage. The tester shows a 60% SOC.
Given that I'm in no rush, should I charge it at 2A or 12A?
2A. Think of it like a dry sponge. Put a dry sponge under a wide open faucet. It wont absorbe many of the drops of water hitting the sponge. Pit put it under a slow running fauvet and it'll drink it all up and be completely saturated.
Not a perfect comparison, I know. But it makes sense to most.
In reply to DrBoost:
This makes no sense to me!
As long as you're not charging it so fast that you generate heat it doesn't really matter.
I think of it as putting soda into a glass. Think of the foam as a surface charge. If you pour fast, the soda will foam up and fill the glass quickly. However, once the foam settles, the glass isn't actually full. If you go slowly, less foam and a fuller cup on the first pour. Sure it takes longer, but it's more effective.
Charging creates heat, the higher the amperage the more heat. The battery can only cool itself as the electrolyte circulates pulling the heat away from the plates. The electrolyte can only circulate through convection so you can create hot spots on the plates.
An AGM battery or dry cell has no liquid electrolyte so they have to be charged very slowly and amperage monitored very closely to keep the heat down.
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