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The more often you charge the battery the shorter will be its lifetime. The battery stores more energy and "lives" longer, if you let the battery turn completly empty before charging. Also you must have time to charge it well, at least 4-5 hours in minimum. The longer the better.
I can say it by my own experience (as I have mentioned it before). My phone T68i with its battery is now 3 year and 2 months old and
the battery still lasts 8,5 days on average.
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PS.
Just a few hours ago my T68i switched off after its battery had lasted 248 hours (nearly 10,5 days). This was now, after more than three years of use!
And as I have mentioned in some other threads, it's not its personal best. The record was 278 hours (over 11,5 days).
So, let's take a good care of our phone and its battery - then the battery serves us for a long time
[ This Message was edited by: Aivar on 2005-08-18 11:03 ]
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Posted: 2005-08-03 12:44:41
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@zdhum: u read good.it's good to keep it toped-up.Discharging it would hurt the battery-read all about it in the 1st posts and at the battery-university.Never mind what aivar says-the pros say different.
This message was posted from a WAP device
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Posted: 2005-08-19 20:01:26
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I did not write what I think or what I have heard or what I have read from somewhere. I told you, what I have been experienced myself! And the conclusion is:
The battery stores more energy and lives longer, if you let the battery turn completly empty before charging.
One my friend also had T68i and he charged it very often (and never let the battery turn empty). And what happened? The battery of his phone lasted for a very little time and after a year or so the battery couldn't last even a day.
The battery of my T68i lasts very well even after 3 years! And this is not an exception. My girlfriend has T65, she also nearly always lets the battery turn completly empty before she starts to charge it. And the battery lives excellently! Her T65 with its battery will be 3 years old in December.
So, I must repeat myself:
The more often you charge the battery the shorter will be its lifetime. The battery stores more energy and lives longer, if you let the battery turn completly empty before charging.
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Posted: 2005-08-21 13:50:53
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that's just luck buddy. You are taking one or two experiences and spinning a story out of it.
I charged my K700 every night all night for over a year, and the battery is no better or worse than the day I bought the phone.
The reason your battery doesn't die when you let it go "dead" is because the phone circuitry is designed to switch the phone off when the battery gets very low. So, it never gets to more than 90% or so discharged. The phone is saving the battery from being killed by people who are stuck in the old wisdom of batteries that have memory affect.
My T610 lasted a bit longer than two days, so I often let it run down halfway, then charge it up and then let it get half-way, again and again and I never had the battery memory affect. That battery also to this day works perfectly. That phone was used everyday for a year, then intermittantly for the next year. Still perfect.
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Posted: 2005-08-21 14:28:34
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Nice post, Max_wedge.
Let's hope that your battery lives more than 3 years too with the "new" way of treating it
I'll stuck to the old wisdom, which "works" for me and for my friend perfectly.
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Posted: 2005-08-21 14:46:31
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Aivar, my battery will last for three years for the same reason yours did, because the phone stops it from completely discharging, not because you completely discharge it. You can't completely discharge it, due to the phone circuitry.
There is nothing wrong with the way you treat your battery, just as there is nothing wrong with charging it every night. Due to the design of the charging system, both systems work perfectly. On NIMH batteries, if you charged it every night it would eventually suffer from battery memory effect. With lithium batteries that simply doesn't apply. If your friends batt died it was faulty, not because he didn't discharge it
Your 2 examples are not sufficient "experience" to go claiming that people shouldn't charge their batteries everynight. You have to look at the broader picture.
It is unnecessary to make lithium batteries run down before charging, it does not improve the life of the battery. That is simply how they are designed.
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Posted: 2005-08-21 15:14:23
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I just have some more comments to say.
Of course it's impossible to discharge the battery completly empty nowadays. The inside clock needs energy to run etc. I mean that I start to charge my battery when the battery is so empty that the phone switches off itself.
Max_wedge, you wrote: "I charged my K700 every night all night for over a year, and the battery is no better or worse than the day I bought the phone."
How can you say that your battery is no better or worse, if you have charged it every night?! Even a very old battery can last a day.
Maybe you didn't charge your battery properly in the beginning? A new battery needs to be run "completely" empty and then to be given a long charging period (as we know, this cycle should be repeated several times in the beginning). Perhaps therefore your battery didn't achieve its maximum capacity. For example, my battery lasted after the first five charges quite badly and then achieved its great maximum.
I hope you agree that battery does not live forever. But what "makes" the battery old? Why one battery lasts 3-4 years in good condition and the other one has power only for a year? The reason is not time but the frequency of charging. It is a wellknown truth that... Don't you really agree with that?
I don't write it on the basis of my own or my friends' experience only. You might read the opinions in Esato where many complain that they charge their battey almost every day and it doesn't last long.
In this thread orang3 wrote in first post:
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You should also understand that due to the chemical processes involved, batteries deteriorate over time. After a certain number of cycles, the battery's maximum charge capacity drops to below 80 percent of its original capacity.
Battery type / Number of charging cycles
Nickel cadmium (NiCd) 1,500
Nickel-metal hydride (NiMH) 300-500
Lithium-ion (Li-ion) 500-1,000
Lithium-polymer (Li-Po) 300-500"
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I don't know are those numbers true or not, but i is interesting comment.
But what do you think, Max_wedge? What makes a battery old?
Looking forward to your reply
Aivar
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Posted: 2005-08-23 16:35:26
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I've got two same BST-37 batteries for my K750i and
the other one seems to last longer than the other.
I've used and charged them exactly the same way.
All I can think of is maybe the weaker one was an old stock battery.
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Posted: 2005-08-23 18:53:53
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Good to see the battery thread is still causing a bit of controversy! Another reliable source of info on recharging batteries can be found on Ripmax's web site. This is a mecca for Radio Control fans. Modern phones and modern batteries ie Li-ion/poly have charge control circuits which make it impossible to overcharge or over discharge the battery. The useful life can be extended with a little care, like keeping everything as cool as possible may get a few extra cycles.
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Posted: 2005-08-23 20:56:00
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But of course, a battery lasting for 500 cycles will still last over a year based on an overnight charge each night. If like me you keep the phone for a year then get a free upgrade, there is no issue. Charge it when it warns you it's low, when you go to bed, sitting in your fav chair on wap. Charge it, use it, charge it. Simple.
Thanks for reading.
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Posted: 2005-08-23 21:07:00
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