Battery question
08 November 2006, 01:05 PM
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Battery question
My newphew asked me a question last night, "Why does it take so long for my mobile phone to recharge when I've plugged it in? Why cant it just suck all the electricity it needs in 10 seconds?"
I was stumped.
I was stumped.
08 November 2006, 01:27 PM
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He's very patient to say 10 seconds 
why not 1 second, or instantaneously?
To pass that electricity would require a high current, thicker wire, much bigger, heavier components in the phone. This would cause electromagnetic radiation which might wipe the SIM card and damage other adjacent electrical equipment, etc, etc. Also the internal battery components wouldn't last long.
But apart from that, nothing.
why not 1 second, or instantaneously?To pass that electricity would require a high current, thicker wire, much bigger, heavier components in the phone. This would cause electromagnetic radiation which might wipe the SIM card and damage other adjacent electrical equipment, etc, etc. Also the internal battery components wouldn't last long.
But apart from that, nothing.
08 November 2006, 01:28 PM
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'cos if it did the temperature of the planet would rise by at least 26 degrees.... And does he want to take the blame for that. I don't think so 
08 November 2006, 01:37 PM
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Originally Posted by David Lock
'cos if it did the temperature of the planet would rise by at least 26 degrees.... And does he want to take the blame for that. I don't think so
08 November 2006, 01:40 PM
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So how much juice is used by, say, a 6 way adapter that's plugged into a wall socket but has a TV, DVD, VHS, Sky + and a lamp, and why doesn't that require thicker cables and rise in temp. by 26 degrees when they're all on at once?
It must be down to some sort of 'absorption' rate no ?
??
It must be down to some sort of 'absorption' rate no ?
??
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08 November 2006, 01:44 PM
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Were not talking about powering something when plugged into the mains, were talking about charging a battery that you want to last over a period of time.
08 November 2006, 01:56 PM
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Originally Posted by AndyC_772
Cheers
(Still confuses me that more current is drawn by the 6-way than a single but doesn't rise in temp much or require the thicker cables mentioned)
08 November 2006, 01:57 PM
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Originally Posted by davegtt
Were not talking about powering something when plugged into the mains, were talking about charging a battery that you want to last over a period of time.
08 November 2006, 02:01 PM
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Originally Posted by davegtt
sorry, my post was aimed at Normans above yours
08 November 2006, 02:12 PM
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Originally Posted by Norman D. Landing
My newphew asked me a question last night, "Why does it take so long for my mobile phone to recharge when I've plugged it in? Why cant it just suck all the electricity it needs in 10 seconds?"
I was stumped.
I was stumped.
A kid with an inquisitive mind..!! I thought they were extinct now, all heads buried in playstations etc..!! I bet that he'll be an inventor or engineer when he grows up..!
In fact if he can provide the solution to the his own questioning, he'll be millionaire by the time he's 15..lol!!
Nige
08 November 2006, 02:16 PM
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Originally Posted by v8voodoo
A kid with an inquisitive mind..!! I thought they were extinct now, all heads buried in playstations etc..!! I bet that he'll be an inventor or engineer when he grows up..!
In fact if he can provide the solution to the his own questioning, he'll be millionaire by the time he's 15..lol!!
Nige
In fact if he can provide the solution to the his own questioning, he'll be millionaire by the time he's 15..lol!!
Nige
08 November 2006, 02:29 PM
#16
Originally Posted by v8voodoo
A kid with an inquisitive mind..!! I thought they were extinct now, all heads buried in playstations etc..!! I bet that he'll be an inventor or engineer when he grows up..!
In fact if he can provide the solution to the his own questioning, he'll be millionaire by the time he's 15..lol!!
Nige
In fact if he can provide the solution to the his own questioning, he'll be millionaire by the time he's 15..lol!!
Nige
08 November 2006, 02:39 PM
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Originally Posted by v8voodoo
A kid with an inquisitive mind..!! I thought they were extinct now, all heads buried in playstations etc..!! I bet that he'll be an inventor or engineer when he grows up..!
In fact if he can provide the solution to the his own questioning, he'll be millionaire by the time he's 15..lol!!
Nige
In fact if he can provide the solution to the his own questioning, he'll be millionaire by the time he's 15..lol!!
Nige
08 November 2006, 02:54 PM
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Originally Posted by Norman D. Landing
(Still confuses me that more current is drawn by the 6-way than a single but doesn't rise in temp much or require the thicker cables mentioned)
The 6 way adaptor still has a 13A fuse in the plug so thats all its rated for, hence no need for any thicker wire than a 3 bar heater with the same 13A fuse in the plug.
Just don't run 6 kettles off the thing
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