If AA battery costs $.50 and is 1000mah how does it compare to mains?

Say mains power is $0.15 per Kwh, how many AA batteries would it take to supply 1 kwh?


PeterZ423 months ago

Interesting question

Let's say that an AA battery is 1.5v and has 1000mah and costs $0.50.

AA Battery Capacity:1.5v x 1000mah = 1500mwh = 1.5wh (watt-hours)

1.5wh x 1000 / 1.5 = 1000wh = 1Kwh

Cost: $0.50 x 1000 / 1.5 = 333.3333333... (repeat) = $333.33/kwh

Mains: $0.15/kwh

So the battery is about 2222 time more expensive than mains

Also, you need 666.6666... (repeat) = 666.66 AA batteries to supply 1Kwh

Keep in mind that these are all ideal measurements, the batteries in real life won't be perfect, there is always a bit of imperfections in real life. The AC Kwh and DC kwh will not be the same, as they are two different types of waveforms.

larrydel (author)  PeterZ423 months ago

Thank you very much!