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Maybe its strange but some day your battery may not wake again!!
At least this is what the sony eric center tell me so i dont risk the battery and i have no problem at all at least for now.
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Zhto h Arfes-gorgones

[ This Message was edited by: Arfi-Gorgona on 2003-09-13 12:45 ]
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Posted: 2003-09-13 13:40:27
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I've owned my P for about 8 months now and lost count of how many times I've let the battery go completely dead and it's still as good today as when I bought it. Infact I've never heard of this oh well.
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Posted: 2003-09-13 13:53:02
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There is quite a lengthy Tips to care for your battery thread here which has some useful info
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Posted: 2003-09-13 13:53:24
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Well if the new batteries dont suffer from the mem effect i dont why i risk mine of course it my opinion and thats because i see what happen to the man in sony center and what the people here tell me.Maybe their just ignorant? i dont know maybe but i choose not to risk,the choice is yours
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Posted: 2003-09-13 14:07:15
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I just can tell my experience and what people from my SE center does says...
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Posted: 2003-09-13 14:12:05
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I dont know and me i see that happen to the man thats why i dont risk and really i dont have a problem at least for now Maybe some batteries are better than others and some last and some dies.
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Posted: 2003-09-13 14:15:30
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AFAIK, it's impossible to completely flatten the battery in the P800, as it will switch off before that point.

Course, you could take the battery out, and short the connections to flatten it (DON'T!), but the P800 shouldn't do it.

So, my money's on it being okay to run the P800 down until it won't take any more.

However, I'm not SE...

I was under the impression that the memory effect is much reduced in new battery types, but still present to some extent.
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Posted: 2003-09-13 14:55:50
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I have read all the posts here and I would like to help by clearing up a few issues.

Firstly, you should read, as was pointed out earlier, the first post in this thread: Tips For Caring For Your Battery (http://www.esato.com/board/viewtopic.php?topic=5503&forum=15)

The information given in the thread I have just mentioned is quite OK accept that it doesn't clearly explain an important issue.

The issue is the Memory Affect.

When I teach/explain to people about Memory Affect I find it easier to explain to people that ALL, yes ALL batteries have Memory Affect, INCLUDING LI-POLYMER AND LI-ION.

Why?

Because allthough Li-Polymer and Li-Ion batteries don't have the Memory Affect in the same way that the Ni-Cad batteries do, they are affected by the number of charge cycles. Now, the first post in the thread I just mentioned did mention charge cycles but didnt explain it very well.

So here goes.

Basically, a battery can be charged a set number of times before it cannot cope very well with being recharged and begins to perform badly either by discharging very quickly or charging to only part of its total capacity (e.g. 60%); and some times giving a false 100% reading.

Now the thing is this. As far as Li-Ion batteries are concerned (I am not sure if this applies to Li-Polymer, but I adopt the attitude that it does) these charge cycles are "significant charges".

What this basically means is this. A Li-Ion battery has a life cycle of approximately 400 charges. However this life cycle is really 400 "significant charges". Therefore charging from 90% to 100% wouldn't necessarily count as a significant charge and thus wouldn't count towards the 400 charges left in that battery. On the other hand charging from say 60% up to 100% would count as a "significant charge" and would be one charge deducted from the battery's life cycle.

The problem arises where people regularly "top up" the charge on their phone or laptop. Usually, they have used the product for a few hours in the day, the battery is down to say 30% and then they charge.

Now if you do that every day, well that's it!! Your battery is useless in a little over a year.

What you should do, is to continue to use the battery until it goes to 0% before charging it. Why? Because charging from 0% to 100% is a "significant charge" but then so is charging from say 30%. Both charges will deducted from the battery's charge cycle lifespan but by using your battery until it goes to 0% you are gettting much more use out of the product compared to the person who continually "tops up" (thereby deducting from the life cycle) whilst having only used say 70% of the available useage time.

Now the best way to achieve this really, is to have two batteries. This is something I have done with all my mobiles and laptops. So you have one battery in use, which you run down to 0%, you then put in your spare fully charged battery, and then charge the 0% battery. In this way you keep rotating the batteries. You will then find that each battery lasts twice as long because they are not being charged daily.

To give an example of what can be achieved, by looking after your batteries, I had on old mobile phone in which the battery (Ni-MH) was still able to hold a charge (although not a full capacity charge) nearly seven years later.

As to running your battery down to 0% on the P800 that should not be a problem. What I do is this. When the battery is getting to around 5% I close all background running apps that I think might cause problems if they suddenly lost power whilst running. And then I leave the battery to discharge to 0% before recharging.

The P800 battery meter will actually read 0% and then after a short while the phone will shut down. No harm will come to your phone - well, I certainly haven't come across any problems.

Although, the cynical amongst us may think it is just marketing hype, it is true to say that you should where possible stick to quality branded batteries. There are reasons for this.

On mobile batteries, they are prone to dropping. If you drop a cheap brand you may find that the internal connections come lose and the battery cell is disconnected and therefor the battery becomes useless. This has already happened to me so be warned.

The other difference between the cheapo brands and the good ones is the the expensive batteries tend to have better overcharging circuitary, this is especially important on laptops which tend to be left on the mains power long after the battery has reached full charge. In some of the very best batteries of course there are even clever little microchips controlling things.

There you are folks.

I hope my info has been helpful.


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Posted: 2003-09-13 16:51:12
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indeed very useful... thnx
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Posted: 2003-09-13 22:57:18
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Good stuff plevyadophy!
I think we can consider this a fairly definitive answer worthy of ending this thread.
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Posted: 2003-09-13 23:05:24
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