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You better go back to school then because its not the battery's internal resistance increasing, its the increasing opposite potential difference which effectively decreases the applied voltage resulting in a drop in current.
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Posted: 2004-10-19 04:04:05
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Both of you are correct. All of us agree that overnight charging is bad.
This message was posted from a K500
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Posted: 2004-10-19 05:56:33
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Really?
Where does it say that overnight charging is bad? I was under the impression it was good, as it enables the battery to be charged to its full capacity.
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Posted: 2004-10-19 08:16:56
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I've always charged my phone overnight. Never had any bad side effects from it. Care to explain why it is so bad?
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Posted: 2004-10-19 08:38:29
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I always charge my phones overnight when asleep, its the only time l don't use them!
This message was posted from a P900
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Posted: 2004-10-19 08:54:37
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i charge my phone overnight too, but i had to leave it on so that the alarm could sound when i wake up. is this bad? i really wish that they make it so that the alarm turns the phone on like other phones.
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Posted: 2004-10-19 09:02:32
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Dont switch off the phone for first few weeks. If there is something wrong you will know. Imo
This message was posted from a K500
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Posted: 2004-10-19 09:24:50
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nickorooster Posts: > 500
There is NOTHING wrong with charging overnight, or as it should be put, continuing charging when the indicator is at 100%. Basically, the guys who were arguing whether it was the battery's internal resistance that increases or potential opposition to flow were simply explaining why it takes so long for the battery to get from 95 to 100 percent.
Excuse me for continuing this "Debate" but isn't resitance just the same as an opposition to flow? I am not highly educated in this area, but I would assume that as a battery fills it is almost like when a resistor heats up, it's resistance increases. From this we can conclude that more energy must be used in overcoming the increased resistance (or potential opposition to flow) and because t=(E/P) and the power input is constant, "t" must increase, thus meaning that more time is needed to fill that last part of the battery.
Well, that's my two cents anyways.
So, in short, no, there is nothing wrong with "overcharging" your phone, aside from a waste of electrical energy as it attempts to overcome the reciprocal rise in the battery's resistance.
Nick
Edit: To all those that think the above is garbage, and that I have no idea, try looking some of it up. To those that understand and can sympathise with my reasoning, good for you.
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This message has most likely been posted from a p800.
[ This Message was edited by: nickorooster on 2004-10-19 14:19 ]
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Posted: 2004-10-19 15:17:47
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nickorooster Posts: > 500
Well, I received a PM from ***** who was apparently banned, and he explained the whole resistance thing rather well. My Physics Proffessor (I can't spell) agrees.
" I know what you mean but no, it is a bit different.
Resistance is the opposition to flow of current by lack of conductivity. In this case, the flow of current is being opposed by an increasing potential difference, which is in reverse polarity to what is being applied by the charger.
When the battery is close to 0V, there is no opposition to the voltage and current being applied by the charger. However, as the battery reaches its fully charged voltage of +3.6V, there is obviously going to be an almost equal and opposing potential difference across the battery, opposing the current flow from the charger.
In short, it is not the INTERAL RESISTANCE ie. conductivity of the battery which is changing, its the POTENTIAL DIFFERENCE ie. voltage across the battery which is changing.
Remember that V=IR, where V is voltage, I is current and R is resistance. If R was exceptionally high, no current would be able to flow from the battery when it was placed in a closed circuit, which means it would not be able to power your phone.
Think about it. "
So, there is his point of view. Frankly, I agree.
Nick
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Posted: 2004-10-20 15:38:56
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And there was me thinking that a battery was just a battery! Why do you have to go complicating things?
I think I'll just go back to thinking about naked . . . . . . Marge.
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Posted: 2004-10-20 16:54:31
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