‘Even a small car battery can deliver many hundreds of amps, but maybe not for long’
Technical Consultant I AM SURE many of us thought we had left all the science stuff behind when we finished school, but when talking to people or asking for advice, there is a need to use the correct units. The most common problem is referring to batteries as, for example, a ‘100-amp’ battery.
There is no such thing, even a small car battery can deliver many hundreds of amps, maybe not for long but long enough to do some damage.
What they usually mean is 100-amp hours and that is very different. This more or less tells us it can deliver 100 amps for one hour, 200 amps half an hour, and 50 amps for two hours and so on. Amp Hours (Ah) on a battery tells us how much electricity a battery can hold when new and fully charged, but that capacity will reduce over time.
( Ed’s note) If you have the time, there’s an interesting range of tables at rapidtables.com (look under electrical units in particular).