Cheaper Electricity the Easy Way

KimYeovil

An AA battery contains between 2 and 4.5 Wh. That's watt hours, not kilowatt hours. So 8 cells with 4.2Wh per cell for a £1 is 0.0336 kWhs for £1. 1 kWh would cost 1/0.336 or £29.46.

Biggles

KimYeovil wrote: »

An AA battery contains between 2 and 4.5 Wh

But I think the cheapos for £1 are much nearer the 2Wh mark (if not less), hence my higher estimate.

Anyway, suffice it to say, it's not going to save you any money.

It's like paying £10 just so you can see your electricity bill go down by 5p.

Zero_Delta

KimYeovil wrote: »

An AA battery contains between 2 and 4.5 Wh. That's watt hours, not kilowatt hours. So 8 cells with 4.2Wh per cell for a £1 is 0.0336 kWhs for £1. 1 kWh would cost 1/0.336 or £29.46.

Hi KY,

I think that we are talking at cross-purposes here.

I am NOT suggesting (or ever stated) that batteries are cheaper than mains electricity. That’s just silly.

The point that I was trying to make is that my small portable radio, run by 1 AA battery is cheaper than using the radio on my mains powered stereo system.

Here is my reckoning:

My stereo system uses approx. 5 kWh per month @ 11p per kWh = 55p per month.

My small portable radio uses 1 AA battery per year @ 12.5 p – or - just over 1p per month.

Biggles

It must be an enormously powerful stereo to use 5 kWh in a month being used for only 2 or 3 hours per week (which is the maximum an AA battery could be used for if it were to last a year as you suggest).

There's your answer obviously - use your cheap radio off the mains. Problem solved.

Cardew

Zero_Delta wrote: »

Hi KY,

My stereo system uses approx. 5 kWh per month @ 11p per kWh = 55p per month.

How long do you have it on for? and at what volume?

Zero_Delta

Biggles wrote: »

There's your answer obviously - use your cheap radio off the mains. Problem solved.

Yeah, exactly what I said in my op!

Fed up with this nit-picking. Won't be back to this thread.

GetRealBabe

Zero_Delta wrote: »

Yeah, exactly what I said in my op!

Fed up with this nit-picking. Won't be back to this thread.

Hi

That's a shame. I would like to know how you got on.

GRB

Biggles

Zero_Delta wrote: »

Yeah, exactly what I said in my op!

Well, no, actually it's the exact opposite of what you said in your OP, where you said to use battery power.

JennyR68

Biggles wrote: »

Well, no, actually it's the exact opposite of what you said in your OP, where you said to use battery power.

depends how you read the sentence

off (removed from) mains
off (from) mains
Off 1

Definition: In a general sense, denoting from or away from

Biggles

JennyR68 wrote: »

depends how you read the sentence

I read it in just the same way as the OP does when she says, in Post 22, "Is that (ie the cost of batteries) more expensive than running off the mains?".