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> P900 in cradle all day - harmful?
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I've been using my P800 in its cradle nearly every day since it first came out and the battery drain has only dropped slightly since new. On average it sits in the cradle from 7:30am till 5pm, five days a week. I don't know if anyone would highly recomend against it, but after 15 or so months I can't say I've really noticed anything odd happen.
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Posted: 2004-07-13 12:48:09
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Hello, The P900 doesnt stop charging when the batteries full.
The mannual says nothing but i dont think SE give a toss about such issues which are hard for a consumer to complain on.
Just unplug the charger and just charge in the evening only.
The P900 has no issue's with going a day whilst docked.
I wonder how long before you get bored of the remote app and dissconnect it and put your p900 in your pocket!
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Posted: 2004-07-13 12:57:00
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To the best of my knowledge Lithium Polymer batteries (P900) are quite happy to be charged up and decharged as often as you want.
It's only the older Nickel Cadnium batteries (cheap Nokia's!) that suffer the "memory" effect where you have to (ideally) completely drain the battery before re-charging it again. Likewise (and slight topic change) Ni-Cad's require a 16 hour full charge first time, but Li-Polymers only need 4 hours and even then I suspect (not sure) that's just "recommended" and not required.
When I used my T28 (first phone with a Li-Polymer battery?) I used to charge it anytime I was near a power outlet regardless of power. Yes it wasn't exactly an amazing phone for battery life, but it must have been charged well over 500 times in a year and my battery life at "full" went from 2 hours 11 minutes to 1 hour 57 (talk time) so it does seem to have an effect, but a pretty minimal one!
My beloved P900 seems to be the same. I've had it 3/4 year now and had no problems at all with battery life getting shorter etc. The only time I really charge it is if it's in it's cradle where it might be for an hour then I'll pick it up do something and put it back there (starting a new charge) for a few more hours etc, so technically that is getting multiple charges
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Posted: 2004-07-13 12:58:24
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Because you treat your battery like a whore you wont relise how long your battery could go with only being given a charge to capacity when needed so you cant make any statements.
Me and my brother both got P900 in November 03' he charges like a whore i only when needed on a long stint when both batteries are full and both moderatly used mine lasts about 3hrs more.
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Posted: 2004-07-13 16:07:00
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Its harmful you have to switch off the main supply
This message was posted from a T610
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Posted: 2004-07-13 16:15:37
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Whoops, blank post!!
You should all know better then to trust what a manual does or does not say. Just because the p900 manual doesnt mention over charging doesnt mean it doesnt happen. It doesnt tell you not to cook your p900 at 180 degrees for 2 hrs because we all know that would be stupid:)
EVERY type of battery is effected by over charging. Thats a simple fact. Some are just better that others. Li Polymer batteries can be charged whenever you want but still need the occasional discharge. Remember Ni MH, what a nightmare. Just thinking about giving them a charge screwed them up.
My advice, Un plug your cradle. If it doesnt need charging then leave it be.
_________________
I've flown a hundred and ninty six missions. Got shot down in every single one of them. Come to think of it, I have'nt landed a single plane in my whole life. Admiral Benson
[ This Message was edited by: Scorchio on 2004-07-13 15:22 ]
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Posted: 2004-07-13 16:17:14
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Quote:
On 2004-07-13 16:17:14, Scorchio wrote:
You should all know better then to trust what a manual does or does not say. Just because the p900 manual doesnt mention over charging doesnt mean it doesnt happen. It doesnt tell you not to cook your p900 at 180 degrees for 2 hrs because we all know that would be stupid:)
EVERY type of battery is effected by over charging. Thats a simple fact. Some are just better that others. Li Polymer batteries can be charged whenever you want but still need the occasional discharge. Remember Ni MH, what a nightmare. Just thinking about giving them a charge screwed them up.
Stop everybody, there is a search function in the forum.. USE it.
And to summarize them.
Overchargin is dangerous: BUT the phone doesn't let you overcharge the battery cause when the phone reaches fullbatterycharge its stop charging and only give power to the phone!
And other stuff mentioned on the prevouis topic:
Its ok to charge however you want and also you don't have to drain out the battery at anytime, infact its better to charge it before it reaches 0%..
SO charge it as often as u like and leave it on the charger.. As said, the phone stops charging after full!!
Otherwise, even one minute of overcharging is dangerous... So if the phones never turned off charging we would have to watch our phones during charge and plug it off as soon as its full!
Also google for li-ion batteries, there are alot of pdf books on them and how manufacturers design charger and chargerroutines in the phone!
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Posted: 2004-07-13 16:51:42
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Seems like there are several schools of thought on this, i only charge my battery when its low and let it have the occasional complete discharge, whatever you think is best your probably best sticking to it.
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Posted: 2004-07-13 17:01:59
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http://www.batteryuniversity.com
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Posted: 2004-07-13 17:06:39
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@Zacay
I happen to think that there are two types of over charging when it comes to batteries. What you have pointed out is that it is impossible to overload a battery thanks to cut of systems on phones pda's etc however(and correct me if I'm wrong) the type of over charging being refered to by this topic is that of needlessly charging the battery up. I does damage a battery to constantly have it plugged in and the charging cut off feature only works to a certain extent. for example: say you have your phone on charge at work and the battery is full resulting in the charge feature being shut of by phone. Now lets say you take it with you to lunch and over that period your use up a couple of percent of power. When you return to work and put the phone back on the cradle it starts to charge again and it is this type of battery topping up that does the damage. I'm blue in the face warning business customers of this problem and more often than not, six months later there back into me complaining about battery life.
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Posted: 2004-07-13 17:14:03
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