**Q1:** I have a battery, say 15 AH and I have a load which consumes 1.5Amps; How does this used to see the capacity of a battery? If the battery is able to deliver 15 AH of capacity that means will it die/discharged in 10 seconds if I put a 1.5 Amps load on it since load is taking 1.5 Amps from battery every second or does it mean it will die/discharged in 10 hours? Is the rating on battery tells us the discharging rate in hours or seconds?
**Another question:** What will happen if I connect the AC terminals to battery? I know it won’t charge but will it explode or something like that? Is it dangerous for us/battery to do this thing? If I have a line wire from which both AC and DC are passing through and now I connect the battery with it, will it be able to filter its DC component from wire itself (and charge itself) or do I have to make a filter(rectifier) for it to separate DC 1st and then charge the battery?
**Q3:** What will happen if I use the neutral wire to carry both the DC + AC line? Should I use a thicker wire? Will it cause some different oscillations in the wire? Is it bad for the AC line?
In: 7
I can only speak to Q1 – You’re just misunderstanding Amps vs Amp-hours.
Amps is a *rate* of current flow. Amp-hours (which is Amps *times* hours) is an *amount of charge*. If a battery has a capacity of 15 AH, that means it has enough energy to provide 15 A for 1 hour before dying (or 1 A for 15h, or 3 A for 5h, or 5A for 3h, etc…). And that makes sense, because of course the more current you draw, the less time the battery can run for. It’s the product of amps x time that remains constant, so that’s what we use to define battery capacity. You can’t give a battery’s capacity in just time, because that depends how fast you’re draining it.
The true-ELI5: You’re trying to describe the volume of a bucket. Amps is how fast you are draining the bucket, the time is how long the bucket takes to drain:
“This bucket will take 15 minutes to drain a 1.5 liters/minute” is like saying “this battery has 15 AH of capacity”. Both are talking about the time it takes to empty the tank *at a specified rate*.
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