For example if i leave all night charging, does it damage the battery? Some batteries after fullycharged, they wont charge anymore. What about u8800?
And what happens if i charge while phone is open and not fully empty? Does it damage?
My charge lasts 16 hours, why is it? I dont use wifi, games, etc. Please help
All ROMs should stop the charging process when reached 100% (the icon changes, on the stock ROM the flash disappears of the icon), therefore I believe that the battery cannot be damaged by leaving the phone plugged in the whole night.
I'm sure that it doesn't matter when you recharge the phone, if it's 10% or 50% it makes no difference to the charging process or the battery. It use to matter on the Li-Nch batteries, but those are long gone...
The fact that the battery only lasts 16 hours, it's an unrelated problem, that I've been struggling with for months now...It's one of the system/hardware components that hangs and doesn't allow the phone to go to sleep...therefore, the battery lasts up to 24h.
Look at this thread, so many users are affected by this...probably most of them and only the recent kernels (.void/Miui) have measures against this problem.http://forum.xda-developers.com/showthread.php?t=1043760
I did not make any rom differences or overclock. Still stops the charging?
Sometimes i charge from pc via usb, can it damage?
It goes 16 hours without wifi or blueetooth or 3g. I dont use too much but goes for 16 hours.
http://forum.xda-developers.com/showthread.php?t=1043760
Here, it is about sleeping mode. My phone goes black screen after 15 seconds idle. What is sleeping mode?
Cursed Chico said:
I did not make any rom differences or overclock. Still stops the charging?
Sometimes i charge from pc via usb, can it damage?
It goes 16 hours without wifi or blueetooth or 3g. I dont use too much but goes for 16 hours.
http://forum.xda-developers.com/showthread.php?t=1043760
Here, it is about sleeping mode. My phone goes black screen after 15 seconds idle. What is sleeping mode?
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Charging from USB is somewhat preferable to wall charger, due to it charging slower, therefore generating less heat. Although, a wall charger won't do any harm. When the screen is off and the phone is not doing anything, the CPU is suppose to go into a deep sleep state, yet with this phone it does not.
wall charging should be preferable in my experience
Ok, let me clarify a few things here.
The battery recharging process is simple, when the battery reaches 2.2V, then the current inside is not enough to sustain the hardware and it's considered empty. Any standard phone charger, will pump current until the voltage is 4.3 and then the so called "negative delta v" signal is being sent and the charger stops pumping.
USB is a BUS designed to carry data, but to be able to carry data it needs to provide a power supply to the connected device. Therefore, any USB should be able to deliver 5V and 500mA to any device connected.
As this phone's battery, according to the wall charger specification, takes up to 1Amp, the simple math tells us that the wall charger will charge the battery twice as fast. Since I've been dealing with batteries, I can tell you that in this case USB charger is a much better choice to recharge this battery, as it delivers only 500mA. The less current going through the electrodes, the lower the chance of damaging the battery due to high temperature.
For more info:
http://www.mpoweruk.com/chargers.htm
http://en.wikipedia.org/wiki/Battery_charger
http://en.wikipedia.org/wiki/Lithium-ion_battery
According to Wikipedia:
"Most modern cell phones, laptops, and most electric vehicles use Lithium-ion batteries. These batteries last longest if the battery is frequently charged; fully discharging them will degrade their capacity relatively quickly.[23] When storing however, lithium batteries degrade more while fully charged than if they are only 40% charged. Degradation also occurs faster at higher temperatures. Degradation in lithium-ion batteries is caused by an increased internal battery resistance due to cell oxidation. This decreases the efficiency of the battery, resulting in less net current available to be drawn from the battery."
These batteries last longest if the battery is frequently charged; fully discharging them will degrade their capacity relatively quickly.
So we must usually charge from usb and must stop before reaching %100 charge, maybe %98?
But when connect to pc, there is an icon shown, before disconnecting we need to click "disconnect secure" icon on system tray, if i dont do, it damages the system of phone?
Cursed Chico said:
But when connect to pc, there is an icon shown, before disconnecting we need to click "disconnect secure" icon on system tray, if i dont do, it damages the system of phone?
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Click to collapse
There is a very small chance on XP, dunno about vista, no harm on win7.
So we should usually charge from usb and must stop before reaching %100 charge, maybe %98?
It is more safe since there is half of the current that passes compered to Charging with the AC adapter. But it theoretically takes almost double time.
Cursed Chico said:
So we should usually charge from usb and must stop before reaching %100 charge, maybe %98?
Click to expand...
Click to collapse
Yes, that's correct. But, I wouldn't worry about stopping before 100%. I know for sure that the stock ROMs are stopping the charging process when reached 100%.
Cursed Chico said:
But when connect to pc, there is an icon shown, before disconnecting we need to click "disconnect secure" icon on system tray, if i dont do, it damages the system of phone?
Click to expand...
Click to collapse
No.You're not going to damage anything by disconnecting the cable directly. That "safe disconnect" is only for data transfer, nothing to do with charging.
Because of the exploding nature of li-ion cells when misused, the battery itself has a protection circuit to prevent overcharge and discharge. So whatever how much the rom wants to charge, the battery will protect itself...
Exactly; the ROM does not have any influence on the charging process - that is why your phone can charge the battery even though it is turned off. The whole process is completely independent from the software your phone is running.
In 2011 it is very hard to damage a battery, it will most likely die from old age. There is just one thing that is not the best thing to do: Trying to switch on the phone when the battery is empty already. If the voltage of the battery drops below a certain point, the battery might be damaged and thus have less capacity afterwards.
To be on the safe side I always turn off the phone a few minutes before the battery is completely empty.
I agree that there is a separate circuit that does the charging, so no matter if the phone is on or off, battery would still charge. But, I believe that the Rom can interfere with the charging process, that's why on some Roms you get the flashing buttons when phone is fully charged or sometimes you can't unlock the phone from the first attempt, when battery is full.
In reality, i believe that charging process has 2 control points, the default (when phone is switched on) and the "failsafe" one that charges the phone when voltage has dropped below a certain value (which has to be is different in terms of current values, as there is no power consumption).
Related
For some reason, every couple of days when I plug my phone in to charge the battery overnight I end up getting an alert (about 4 in the morning!) to change the battery because mine is dead, along with the back up battery, and then the phone shuts off within about a minute. Luckily I have another battery, which I then put in, and then put the dead battery in the "back up battery" slot in the cradle to charge, which it does. I don't know why this happens but it is very frustrating. I am afraid of this happening on a trip out of town where I won't have the ability to use my cradle, unless I bring it which is a big hassle. I don't know what to do.
This IS vexing. By the fact that it charges the extra battery - we know that the power transformer is connected. Since the device does not seem to be charging (possibly even discharging?) - it seems that either the connector on the charging base or the connector on the device itself are bad.
Have you used the power dongle connected to the power transformer to attempt to charge the device? This would tell you if it's the charging base or the device. If it charges outside of the base, it's the base - if not, it's the device.
Best of luck!
How are you charging the battery - from mains power or through the USB?
I had a situation where I was only using USB power to the cradle and although this worked most of the time, I noticed that if the battery was already low (<50%) then the battery seemed to discharge rather than charge.
So the trigger in your case may be the amount of charge left in the battery before you start re-charging it.
I think other people have reported similar discharging situations, so some other ideas might emerge from a search of other threads.
HI!
This might be a stupid question...
During the day my O2 Mini is always connected to my laptop thru the USB sync wire and therefore its keeps getting charged.
Is that in any way harmful for the battery...does it reduce battery life over the long run??
Thanks.
Ujj
ujj75 said:
HI!
This might be a stupid question...
During the day my O2 Mini is always connected to my laptop thru the USB sync wire and therefore its keeps getting charged.
Is that in any way harmful for the battery...does it reduce battery life over the long run??
Thanks.
Ujj
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Click to collapse
No not Lithium Ion batteries. In fact it is better to charge the battery as often as possible.
is that fact? i cant believe it.
It is the way the battery is designed, there is logic in the battery that cuts off voltage when the peak is reached as far as I know.
Thanks cruisin-thru and skjelnes .
If you let them go flat for any length of time, they die completely.
USB charging control
Still this whole battery charging and technology issue is quite ambiguous. No one can really guarantee that there is a clear answer. For instance why do you have to give the battery an initial 8-hour charging if it is a new generation battery?
In any case it would be interesting to know how the charging control works. There are some options:
- It can be controlled by a circuit which cuts off power at a certain level of charge (no way to play with this option).
- It may be controlled by software which would be great because one could (easily) interfere with it. In this case there must be some kind of relay switch controlled by the operating system.
- It could also be not controlled. In this case the battery never stops charging. Only the indication changes when a battery meter reaches a certain level. This looks more likely to be the case as the initial 8-hour charging might mean keeping the battery under voltage during the initial charge as even though the indication states that it is fully charged the charger is not disconnected by any control system.
Does anyone have some solid information on the above assumptions?
Note: I tried to isolate the power pin of the USB cable in order to prevent the device from charging but then it was not recognized by the USB (got a USB connection error). Obviously the power line of the USB is used for connection and signal as well and not only as a optional power supply to the connected device.
I'm currently trying to find something in the registry about charge control....
Maybe Microsoft has hidden a secret option somewhere in there... :?
Anonymous said:
I'm currently trying to find something in the registry about charge control....
Maybe Microsoft has hidden a secret option somewhere in there... :?
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Click to collapse
Sorry, forgot to log in...
Re: USB charging control
savas said:
Does anyone have some solid information on the above assumptions?
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Click to collapse
Find everything you want to know on lithium-ion batteries on batteryuniversity.com
here http://www.batteryuniversity.com/partone-5.htm
and here http://www.batteryuniversity.com/parttwo-34.htm
Serge
A litium-ion battery gets worn from three things:
* Normal use
* Heat
* Full charge
A short while after the Ipod battery dirty secret leaked, I read why the batteries only last for like a year. A NiCd battery HAS to be cycled completely to last as long as possible because of their memory effect. A NiMh battery LIKES to be cycled as completely as possible for longest life.
A Li-Ion battery does not have the memory effect - therefore a lot of people seem to assume that you can charge a Li-Ion battery any way you want. That is not correct... Everyone of you ever used a laptop with a Li-Ion battery every day at work, with the ac-adaptor plugged in knows that the battery is ready for garbage bin after one or two years.
Why? You've almost never used the battery... It's always fully charged... The battery should have lasted much longer you think...
Isidor Buchmann is president at the company Cadex which makes battery chargers. He has got more than 20 years of experience from the battery business.
At the site: http://www.batteryuniversity.com he has written an article where he explains the mechanisms inside a Li-Ion battery and provides tips about how to treat the batteries.
Finally he gives the following advices:
*Don't discharge the battery completley. It's better to discharge the battery a little more than halfe than making a complete discharge.
* Discharge the battery completely and then charge it completely to calibrate the battery meter
* Keep the battery cool
* For long time storage: keep the batteries charged at 40% in the fridge
* Do not use the ac adapter and the battery when the battery is fully charged. Heat and unneccesary charging after the battery is fylly charges destroys the battery
My 2 cents.
// Anders
Re: USB charging control
savas said:
why do you have to give the battery an initial 8-hour charging if it is a new generation battery?
In any case it would be interesting to know how the charging control works. There are some options:
- It can be controlled by a circuit which cuts off power at a certain level of charge (no way to play with this option).
Click to expand...
Click to collapse
I think most questions have been answered, except Magician specific ones, i.e.:-
The Magician has to be initially charged for at least 8 hours to:-
1. Make sure the main battery is fully charged and formed, and charging logic calibrated (future capacity depends on this)
2. Charge the backup battery. Unlike the main battery, this only gets a trickle charge which starts after the main battery is at 100%. So it needs those 8 hours to get to full capacity. Remember to do this if you ever drain the backup battery.
Lithium charging logic is built into the battery, so no way to tamper with the settings. The NiMH backup battery logic will be built into the Magician.
Very interesting reading! I didn't know about the issue with laptop batteries.
Loboman said:
Very interesting reading! I didn't know about the issue with laptop batteries.
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Click to collapse
Me niether. I knew exactly how to treat NiCd and NiMh batteries, but when I bought a laptop, I wondered how to treat Li-Ion batteries. After some search I found the info i just presented here.
// Anders
Very interesting information indeed! Just some more comments:
Anders Johnsson said:
*Don't discharge the battery completley. It's better to discharge the battery a little more than halfe than making a complete discharge.
Click to expand...
Click to collapse
Anders Johnsson said:
Do not use the ac adapter and the battery when the battery is fully charged. Heat and unneccesary charging after the battery is fylly charges destroys the battery.
Click to expand...
Click to collapse
Ineedtoys said:
Lithium charging logic is built into the battery, so no way to tamper with the settings. The NiMH backup battery logic will be built into the Magician.
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Click to collapse
OK we can easily avoid discharging the battery below 50% or 60% at normal conditions even when traveling through a USB port of our notebook (3rd quote)
We should also avoid a USB connection at a 100% (2nd quote) or even at a 90% (3rd quote) charge level unless we can find a way to cut off the power supply to the battery. The only option would be to find a way to do this from the device, before the internal logic of the battery. As far as I can understand the internal battery logic allows charging whenever connected to a power supply and it only informs somehow the device of the charge level.
OMG.
All this nonsense about batteries.... it's easier to just buy a new battery or a new device after 18 months, rather than let your charging habits be dictated by how batteries like to be tickled!
Easier yes, more expensive too.. Dell sure knows how to charge (!) you for a new batt with built-in subwoofer..
Does it matter if we don't charge it all the way till it's full? If I'm charging it till about 95% and I really need to unplug it. How much damage will it do to my battery?
dacmo said:
Does it matter if we don't charge it all the way till it's full? If I'm charging it till about 95% and I really need to unplug it. How much damage will it do to my battery?
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Click to collapse
I'm not following you - I think. If you unplug it at 95% it's a lot better than unplugging it at 100%.
Summary:
Full charge: BAD
Full discharge: BAD
Heat: BAD
Extreme cold: BAD
// Anders
This is the first time that I ever heard that charging up to 100% is bad. I know that leaving it on the charger for extended periods is bad but to say that charging to 100% is bad.. that's absurd!!! :shock:
hi,
I have the problem, that if I charge the battery from near empty state, that it requires 4-5 hours to charge with the ac adapter and if i charge it via usb it needs 910 hours. The issue is, I am not at the same place the whole time,
so sometimes I need it to unplugged, before the battery is full, so this may quicken a potential memory effect. How do you handle the battery charging?
do you charge it before it gets empty or do you unplug before its full?
Did you find a way to charge it faster?
cheers Avalun
Avalun said:
hi,
I have the problem, that if I charge the battery from near empty state, that it requires 4-5 hours to charge with the ac adapter and if i charge it via usb it needs 910 hours. The issue is, I am not at the same place the whole time,
so sometimes I need it to unplugged, before the battery is full, so this may quicken a potential memory effect. How do you handle the battery charging?
do you charge it before it gets empty or do you unplug before its full?
Did you find a way to charge it faster?
cheers Avalun
Click to expand...
Click to collapse
Always charge your device switched off if possible. This makes the charging time shorter and helps the battery to "calibrate".
If phone on, make sure screen is off. Also helps.
Your phone will always take longer to charge while synced through USB.
Try and let the phone completely drain before charging it. This should increase battery length.
hi,
I usually plug it on when the message of critical battery level appears, the problem if I switch the device off is, that no one can call me during this time.
How long does your HD need to charge from near empty to full?
Avalun said:
hi,
I usually plug it on when the message of critical battery level appears, the problem if I switch the device off is, that no one can call me during this time.
How long does your HD need to charge from near empty to full?
Click to expand...
Click to collapse
To fully charge from empty it normally takes a couple hours.
Generally I always charge my phone at night and have it sync'd via USB during the day so it rarely gets below 75%
There has been previous threads regarding battery strength, charging etc.
Try typing battery into search this forum at top of page.
Hope this helps
hi,
thanks for the answer I already read many other battery threads here, they are all about battery draining, not charging time.
So I thought I just ask, what other peoples have to say about this.
As I see the charing time is normal so thanks for the answer.
Hi, do you have any workaround how to set my Legend to not charge the battery while it is connected to PC's USB port?
When I want only to transfer some files to SD card and plug the device into USB, it starts to charge. It is very important for me because it continuously damages battery if this happens several times only for some minutes. In Windows mobile there is a great option to not charge when device is connected to USB. I hope there is an option to do this also on android.
pe3ksve3k2 said:
Hi, do you have any workaround how to set my Legend to not charge the battery while it is connected to PC's USB port?
When I want only to transfer some files to SD card and plug the device into USB, it starts to charge. It is very important for me because it continuously damages battery if this happens several times only for some minutes. In Windows mobile there is a great option to not charge when device is connected to USB. I hope there is an option to do this also on android.
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Click to collapse
I'm pretty sure the batteries today doesn't take any harm of this type of charing. Correct me if i'm wrong
arxx said:
I'm pretty sure the batteries today doesn't take any harm of this type of charing. Correct me if i'm wrong
Click to expand...
Click to collapse
Hmm, on the hand way I am pretty sure that it harms the battery ... 1minute chargings are not good for battery...
I am also certain it DOSEN't damage the batteries...
However.. There are several reasons to disable charging when connection to a PC.
For instance, using a USB hub without additional powers, the drain the phone will put on the hub, will make the rest of the stuff connected to it stop working.
Or simply just to preserve the batteries when using a laptop. The batteries on laptop is bad enough as it is, so no need to put more drain on them...
Interessting reading:
www!batteryuniversity!com/partone-12!htm
*replace ! with .
Lithium-based batteries (like those used in basically every single mobile phone now) love to be topped up constantly. In fact, they suffer permanent damage to the lifetime of the battery if they are ever empty. Don't worry about charging them for a few seconds are a few hours, as long as you don't let them go flat.
Lithium batteries will only work best for a few years from the day they are manufactured (not their sale date, by the way). You'll notice if you have an old mobile phone or iPod that they'll start to run low faster and faster the older they get. This is just a consequence of the chemicals they are made of. It's also why some people refuse to buy Lithium-powered devices that don't make it easy to replace the battery (like iPods, for example).
Also, Lithium batteries don't hold their full capacity right away. They have to be charged for 300% of their capacity for them to be running at peak, although you do not need to do this all at once. This is why some devices come with advice that you discharge them completely a few times right at the beginning. I never do this, because as I advised earlier you do not want to let them go flat. Instead, I charge it up to 100%, use the device down to 50%, charge back to 100%, over and over, since each of those charging sessions contributes to the total 300% necessary.
Nickel-Cadmium batteries were the old sort of rechargeable batteries used in other sorts of devices (toys, remote controls, etc). The best care advice for them is to leave them in the charger until they are needed, and use them until they are completely flat before charging again.
Hi, I use MyPhoneExplorer to write sms from my laptop (tried EasySMS and RemoteSMS and didnt like them) while using the cable-mode. JuiceDefender somehow always turns off the WiFi eventough i add the MPE-Client to the allowed apps. However, since my Desire HD would be connect via USB to my laptop all the time, is it bad for the battery?
I know that on laptops you should remove the battery if its connected to the AC all the time.
Thanks
IMHO any kind of battery will degrade with time if constantly connected to a power source. So if you connect your phone via USB you better keep an eye on your battery..
No. Your battery will not get worse. It is true that a battery will lose its capacity faster if its always at 100%, but we are talking about a mobile phone. It will not be connected 24/7 for many weeks at the time so thats nothing to worry about.
Sent from my HTC Desire HD using XDA Premium App
zakazak said:
I know that on laptops you should remove the battery if its connected to the AC all the time.
Click to expand...
Click to collapse
This is a myth. Might have been true in 1995 maybe but not with today's Li-Ion or Li-Polymer batteries. Just don't worry about battery, there is nothing you can do to make it better or last longer. Charge whenever you want to and be happy using your device It is the same as with memory optimizers and task killers - people are used to them from other times and other platforms and think they do good. Just don't let it discharge too much too often, they say that the best for batteries is to charge them when they're not below 40% of capacity (but even so, I don't think it matters much).
regards,
D.
I agree with dalanik, Li-Ion battery perform better if you charge it often. Actually it is bad if you keep discharging them all they way to 0 and then recharge them all the way up to 100%. It might be good in the old days where there were NiCd.
Sometimes the battery stat could be the answer. The problem with Li-Ion battery is if you overcharge them then they can explode so there is like a stat that tells how much you can charge upto, so if your battery stat is screwed up then your phone thinks it is at 100% but it might not be. Try this and this might improve your battery by retuning the stats (from HTC themselves)
The following steps should significantly extend the battery life on your phone. Please connect the phone to the charger with the phone powered on, and allow the phone to charge until the notification LED is green, indicating the device is fully charged. Disconnect the phone from the charger, and power it off. Reconnect the phone to the charger with the phone powered off, and allow the phone to charge until the notification LED is green. Disconnect the phone from the charger and power it on. Once the phone is powered completely on, power it off again and reconnect it to the charger until the notification LED is green. Disconnect the phone, power it on, and use it. You need to use this sequence only once. If the issue of battery life on our phone persists, I recommend you contact our HTC accessory department directly.
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Click to collapse