How do fastest discharge HD2? It is special softwar or trick to do it?
Why do you need to do this other than by leaving the phone on?
Sent from my HTC HD2 using XDA App
start pocketplayer and start listening to a radio stream. then start the camera and let it on. should be enough xD
or just boot android XD
Why? Because I had 2 batteries and is better first battery discharge to 0% before I started charge it.
D4rkSoRRoW said:
or just boot android XD
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LOL
it's really not a good idea to completely discharge Lithium ION batteries.. it does tend to screw them up a bit..
I used to work on batteries for a living and deep discharges are not good news.. ESPECIALLY with Li cells
"Avoid frequent full discharges because this puts additional strain on the battery. Several partial discharges with frequent recharges are better for lithium-ion than one deep one. Recharging a partially charged lithium-ion does not cause harm because there is no memory. (In this respect, lithium-ion differs from nickel-based batteries.) Short battery life in a laptop is mainly cause by heat rather than charge / discharge patterns"
taken from http://www.batteryuniversity.com/parttwo-34.htm
nutmegy said:
it's really not a good idea to completely discharge Lithium ION batteries.. it does tend to screw them up a bit..
I used to work on batteries for a living and deep discharges are not good news.. ESPECIALLY with Li cells
"Avoid frequent full discharges because this puts additional strain on the battery. Several partial discharges with frequent recharges are better for lithium-ion than one deep one. Recharging a partially charged lithium-ion does not cause harm because there is no memory. (In this respect, lithium-ion differs from nickel-based batteries.) Short battery life in a laptop is mainly cause by heat rather than charge / discharge patterns"
taken from http://www.batteryuniversity.com/parttwo-34.htm
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Thanks. Interesting. But on the other hand side some people recomend sometimes full discharges. I do not know what is true
what the f***
everybody said it would be the best to fully discharge and then fully load the battery
my experience is the same Oo but the new batteries doesnt have memory effects, thats true, and its not so bad to partial charge them yea.. but i thought it would be still better to full discharge - charge them Oo
D4rkSoRRoW said:
what the f***
everybody said it would be the best to fully discharge and then fully load the battery
my experience is the same Oo but the new batteries doesnt have memory effects, thats true, and its not so bad to partial charge them yea.. but i thought it would be still better to full discharge - charge them Oo
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That's just my experience with Lithium Ion I personally dont fully discharge because i worked on some Li cells for a project i was working on and they never recovered properly... and in some cases caused major damage to the cells themselves... just voicing my opinion
the main reason to do an (almost) full discharge / charge cycle with Li+ batteries is to callibrate the battery monitor circuits.
As said above there is no need to discharge Li+ batteries to prevent battery memory, , it doesnt happen with these, only NiMH batteries.
If the battery gets to 0% whilst the phone is in use, it still has some charge in it, because the protection circuits kick in and power off the phone when there is still some charge in it, so dont worry about getting to completely flat whilst in use, however forcing it to discharge, for example trying to enter bootloader over and over, or shorting the power connectors, can potentially cause problems, because the protection circuits aren't working correctly at that time.
The same goes for overcharging, you should never use direct charging devices, because these dont always have overcharge prevention circuits. You should only ever charge it in your device, or in a compatible charger. (So no building your own using two bare wires! ! )
Related
Hi guys, what is the right way to prolong battery life? Keep the xda charged all the time when possible? Or run the battery until it says charge again. Btw im talking about the internal built in battery. Thanks in advance.
The best thing for rechargeables is to completely empty them before recharging on regular basis. In case of an XDA this is not a good idea since you loose all your data when the battery goes flat. So my guess is to wait with recharging as long as you dare. :wink:
Li-ion Polymer batteries have no memory effect
So my guess is to wait with recharging as long as you dare.
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Not really... Used to be true for NiCad batteries though...
The XDA has a Li-ion polymer battery. This page has a lot of interesting facts about this technology for those that want to know. Among other things, it says:
No memory effect
The so-called memory effect is a major drawback for NiCd technology. Although the effect is not well understood, the practical manifestation is that NiCd and NiMH cells which have been subjected to repeated partial discharge seem to 'remember' the electrical capacity last delivered and only then deliver this on the next discharge. The memory effect is only removed by undertaking a slow full discharge, which again causes major logistical problems.
Li-ion Polymer cells have no memory effect and can be recharged at anytime without the need for a full discharge.
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I havent gotten a new phone since 09 Hero.....whats the deal with battery charging. Do I need to fully charge the phone before using it? Do you drain the battery fully before re-charging it?
what give the battery the best life possible?
Never, ever, never, ever, never, never, ever drain a lithium based battery to nothing. Very, very bad. Charge it and keep it above 50% for the firstweek.
Swyped from my Atari 2600
overclockxp said:
Never, ever, never, ever, never, never, ever drain a lithium based battery to nothing. Very, very bad. Charge it and keep it above 50% for the firstweek.
Swyped from my Atari 2600
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Thank you. That is the type of advice I need.
kinextions said:
I havent gotten a new phone since 09 Hero.....whats the deal with battery charging. Do I need to fully charge the phone before using it? Do you drain the battery fully before re-charging it?
what give the battery the best life possible?
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Even your Hero should be the same. Most modern cell phones use Lithium Ion which do not have memory effect.
There is no memory for Li-ion batteries so go ahead and just use your phone. You do not have to keep it above or below a certain charge. The phone will not allow the battery to drain to completion so you do not have to worry about that. It is very bad to let a Li-ion battery completely drain but there are fail safe measures implemented in the phone/battery to prevent that. 0% charge on your phone does not mean 0% battery, its just the mA at which your phone thinks the battery has 0% battery remaining.
I wonder if there's going to be a similar procedure to the OG EVO's plug, unplug, turn off, charge, unplug, turn on, turn off, charge method (or whatever it was) to maximize battery life.
mevensen said:
I wonder if there's going to be a similar procedure to the OG EVO's plug, unplug, turn off, charge, unplug, turn on, turn off, charge method (or whatever it was) to maximize battery life.
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Bump charging works for lots of phones to my understanding. Something about how the phone at first doesn't charge to 100% - when it gets to a certain point it just keeps it maintained at that level .
While it is true that lithium ion batteries don’t suffer from “memory” problems such as NiCad batteries they do have a lifespan. For example, the lithium battery in the laptop that I am using right now, and have used for the past year, currently has a 98% charge and is not charging. That’s much, much better than a NiCad battery would be. I can really see the NiCad issue in my rechargeable cordless tools.
But lithium batteries will eventually die. Just ask the first generation iPud owners. Their batteries were failing just after a year of ownership and Apphole wouldn’t do anything about it. They had reached the end of life of their batteries.
Lithium batteries do take a little bit to break in though. You’ll notice a slight improvement as time goes on for the next month. But I would still refrain from draining the battery too much.
Thanks for the input...I too have the hero, and was curios...
...is it Friday yet?
there was a recent article I seen from a link in the g2x forums where they go to actual experts on the lithium who designed the actual cells and ask them how is best to charge them.
the honest answer is for life being your most concern. that means for the battery to keep a consistent charge over the life of the phone without losing actual daily life on the battery,
you have to plug it in when the phone ask at about 20%. then unplug it when the phone says the battery is full. Do not leave the battery plugged in for hours over full. said something about the charge disburst weird or something
anyway it was a link in the g2x forum in general. im sure you can finds it. Ill look if you really want me to,
Lots of info on Li-ion batteries:
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries
Being that the Battery stats are stored on the /Data partition, how is this minimum threshold managed?
Why "deep battery cycling" or "conditioning," is bad for your battery
In summary, "conditioning" your battery is only good for calibrating the tools which predict how long your battery will last.
I.e. people seem to be recommending that new phones should be completely discharged a few times and then fully recharged. In some cases, people are recommending that the phones be left discharged for long periods of time before recharging. THIS IS A BAD IDEA AND WILL NOT HELP BATTERY LIFE.
Again, you can do this to calibrate the battery monitor, but this will not help the battery itself.
Here's a quote from wikipedia *since I am a new user I can't directly link but go to en(DOT)wikipedia(DOT)org/wiki/Li-ion_battery
Like many rechargeable batteries, lithium-ion batteries should be charged early and often. However, if they are not used for a long time, they should be brought to a charge level of around 40%–60%
Lithium-ion batteries should not be frequently discharged fully and recharged ("deep-cycled"), but this may be necessary after about every 30th recharge to recalibrate any electronic charge monitor (e.g. a battery meter). This allows the monitoring electronics to more accurately estimate battery charge.[27] This has nothing to do with the memory effect.
Li-ion batteries should never be depleted to below their minimum voltage, 2.4 V to 3.0 V per cell.
Li-ion batteries should be kept cool. Ideally they are stored in a refrigerator. Aging will take its toll much faster at high temperatures. The high temperatures found in cars cause lithium-ion batteries to degrade rapidly.
Li-ion batteries should not be frozen [50] (most lithium-ion battery electrolytes freeze at approximately −40 °C; however, this is much colder than the lowest temperature reached by household freezers).
Li-ion batteries should be bought only when needed, because the aging process begins as soon as the battery is manufactured.[27]
When using a notebook computer running from fixed line power over extended periods, consider removing the battery[51] and storing it in a cool place so that it is not affected by the heat produced by the computer.
Hope this helps someone.
Thank you DarkDvr, wikipedia credits to him
Also, feel free to read up at batteryuniversity(DOT)com/learn/article/how_to_prolong_lithium_based_batteries
*again, this is my first post so it wont let me link directly.
Good read. Al though, this is XDA after all and you will be flamed for using wikipedia as as a source. Just giving you heads up.
Lejjvi said:
Good read. Al though, this is XDA after all and you will be flamed for using wikipedia as as a source. Just giving you heads up.
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"battery conditioning" is only bad if you do it all the time and drain it completely dead often...
Lithium ion batteries don't really need this...
And should only be done if you think you have faulty battery stats due to flahing new software or roms....
We all know this and the people that don't now know.. thanks op for informing the uninformed!
sent from a 3devo
You need to condition it for the phones software as well... Otherwise it will shut off before the battery is actually dead. But yes, you shouldn't do it all the time.
People confuse why I needs to be done is all.
Yeah, should change the title. It's misleading.
Sent from my HTC Evo 3D.
there is a diffrence between a deep cycle and a normal cycle.they are only resistant to developing a memory.
Yes, I know this xda, but this after reading some of the multiple battery life threads it seemed like there was some misinformation floating around. I mean, I know batteries are the cheapest part of the phone and easy to replace, but still. No point in going through all the trouble of multiple deep cycles when it actually does harm to the battery.
Also, I wonder what the people with 2 batteries do, and how this affects the battery meter. Or, if you switch to a higher capacity battery. At what point does the unit recalibrate itself?
So I have had mine sitting here all packaged up since tuesday.
And im looking to now actually open it and play with it,
Do you recommend I charge to full when off, or on? Perhaps run it dry and then charge it up?
You used to be told, Charge it for 8 hours before you use it...
That surely can't be true of todays rechargeable battery technology?
[Q] charging and battery damage
If I leave my touchpad on the touchstone charger for long periods and the touchpad is switched on will this damage the battery?
I know I have had laptops and always ran them of the mains and the battery has stopped holding a charge.
Cheers.
I assume that the touchpad has a charging circuit that stops it charging when the battery is full, but batteries will always fail after a while regardless. Lithium batteries are best charged often and not let run down too much in between.
Also, dson't let a lithium battery run down completely, you can significantly shorten its life doing that.
Troute said:
Also, dson't let a lithium battery run down completely, you can significantly shorten its life doing that.
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source? I thought lithium battery had no memory.
It's not a memory issue, running a lithium battery flat (deep discharging) has a physical effect on it where it will lose it's ability to recharge to as high a level as the previous charge. Each time this happens the battery loses more of it's ability to reach an effective voltage.
Don't take my word for it, do your own research, there's plenty of information out there it internet land.
alexhayuk said:
If I leave my touchpad on the touchstone charger for long periods and the touchpad is switched on will this damage the battery?
I know I have had laptops and always ran them of the mains and the battery has stopped holding a charge.
Cheers.
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The dev for Dr.battery's has a thread that states that leaving your Touchpad on the touchstone for long periods of time should not impact the battery. Due to it switching to powering the unit after its charged. Though he is doing some testing on that. Also his app should be updated soon for the Touchpad (available through preware). I am still going to contact HP to discuss this as well. I would hate to damage a non replaceable battery. Will update if I have any new info.
Sent from my HTC Sensation Z710e using xda premium
Troute said:
It's not a memory issue, running a lithium battery flat (deep discharging) has a physical effect on it where it will lose it's ability to recharge to as high a level as the previous charge. Each time this happens the battery loses more of it's ability to reach an effective voltage.
Don't take my word for it, do your own research, there's plenty of information out there it internet land.
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I have done my own research. That's why i don't think this is accurate.
If you have some proof please share.
Besides common aging, a Li-ion battery can also fail because of undercharge. This occurs if a Li-ion pack is stored in a discharged condition. Self-discharge gradually lowers the voltage of the already discharged battery and the protection circuit cuts off between 2.20 and 2.90V/cell.
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http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
Basically through normal use you can probably expect around 250-300 full charge cycles (partial charges only count as partial and add up with other partial charges to be a full cycle) in an average battery pack before it has degraded to 80% of it's original capacity. I don't see anything that point to full discharges being damaging. However storing it for longer periods of time fully discharged can affect life.
ambivalent-one I think the figure of 250-300 charge cycles you've pulled from that page refer to deep discharge cycle tests done by them, personally I'd be very unhappy with that kind of lifespan in a battery in regular usage. The same page you've posted http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries shows a chart of charge cycles versus depth of discharge.
Table 2: Cycle life and depth of discharge
A partial discharge reduces stress and prolongs battery life. Elevated temperature and high currents also affect cycle life.
Charges - Depth of Discharge
500 - 100% DoD
1500 - 50% DoD
2500 - 25% DoD
4700 - 10% DoD
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As you can see a L-ion battery can be made to last nearly ten times longer by keeping the charge level up near max.
Quote from http://www.batterieswholesale.com/damaging_batteries.htm
The Li-Ion cell should never be allowed to drop below about 2.4V, or an internal chemical reaction will occur where one of the battery electrodes can oxidize (corrode) through a process which can not be reversed by recharging. If this occurs, battery capacity will be lost (and the cell may be completely destroyed)
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karan1203 if you reckon the information about deep discharge not accurate, can you provide the results of your own research that shows this?
Just let it die the first time, then charge when under 5%.
karan1203 said:
I have done my own research. That's why i don't think this is accurate.
If you have some proof please share.
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Your research must've been incredibly basic in that case. The 2nd result I get when Googling "lithium batteries" gives me the wikipedia page which has a small amount of into on it:
http://en.wikipedia.org/wiki/Lithium-ion_battery
Look at the "Safety requirements" section for a start.
Also Google "lithium batteries discharge" returns some useful links.
...
Perform shallow discharges.
Instead of discharging to 0% all the time, lithium-ion batteries do best when you discharge them for a little bit, then charge them for a little bit. The table below, from Battery University, shows that discharges to 50% are better for your battery's long-term life than, say, small discharges to 90% or large discharges to 0% (since the 50% discharges provide the best number of cycles-to-usage ratio).
Don't leave it fully charged.
Similarly, lithium-ion batteries don't need to be charged all the way to 100%. In fact, they'd prefer not to be—so the 40%-80% rule you heard is a good guideline. If you do charge it to 100%, don't leave it plugged in. This is something most of us do, but it's another thing that will degrade your battery's health.
Fully discharge it once a month.
This may seem contradictory, but hear us out. While lithium-ion batteries shouldn't be discharged regularly, most modern batteries are what's known as "smart batteries". This feature can get miscalibrated after a lot of shallow discharges. So, manufacturers recommend fully discharging your battery once a month to make sure this stays accurate.
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Is this true?
you can be as neurotic as you like over this, but it really d doesn't make a lot of difference, just enjoy your phone.
Sent from an abused battery
The only big no no is to constantly discharge to below 5% and recharge . That according to the experts leads to a much shorter battery life .
Yes leaving on charge is a waste .
Wiping Battery stats does not improve battery life .
But all this is an old story posted time and again and bring nothing new .
jje
JJEgan said:
Yes leaving on charge is a waste
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It may be a waste but is it detrimental to the battery? I always plug my phone in when I go to bed and take it off the charger when I get up in the morning.
Chromag9 said:
It may be a waste but is it detrimental to the battery? I always plug my phone in when I go to bed and take it off the charger when I get up in the morning.
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there is a built in feature that stops charging once battery level reaches 100%. so there will be no harm to your battery. I have doing the same since gs1
My old Nokia 3510 needed a battery replacement after 4-5 years since it only held 3 days worth of charge instead of the usual 7-8.
I constantly let it discharge from 100% (overnight charging) to empty, the replacement battery cost me 5 bucks.
My Galaxy S1's battery has, after 2 years, no observable loss in capacity with overnight charging to 100% and dropping to 10-15% over 1-2 days.
A replacement battery would cost roughly 15 bucks.
I could go on the same about my Laptop, Netbook, Tablet and other devices with rechargeable Li-Ion batteries.
The point is; don't try to forcefully extend your battery life, enjoy your phone. Most people replace the phone every 1-2 years and the batteries are designed to live that long with high usage and deep-discharging. If yours should not or you plan to keep the phone longer, a replacement battery is cheap.
there is a built in feature that stops charging once battery level reaches 100%.
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All Lithium batteries have it (and need it) since there is a risk of damage, fire or even explosion when it is overcharged. That's why not the phone but the battery itself has the corresponding controller. Since the controller cannot measure the exact capacity of the battery (only an estimate), it is recomended to deep-discharge and fully charge (charge-cycle) the battery once in a while to reset the controller's counter.
Battery replacement is cheap and easy as abc. That's the benefit of having removable battery. Just enjoy your phone.
Sent from my GT-I9300 using xda app-developers app
So why do Sammy stop charging at 99%
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gsw5700 said:
So why do Sammy stop charging at 99%
Sent via TCP/IP
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Why don't you just read the thread and you will see the explanation?!
i have always been charging my samsung galaxy note and sIII overnight ever since i got them , i stil have great battery life !
akboiboi said:
i have always been charging my samsung galaxy note and sIII overnight ever since i got them , i stil have great battery life !
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Same here. No broblem.
Sent from my GT-I9300 using Tapatalk 2
Still no one answered my question... :silly:
Is the small 40%-80% charges better for the long-term battery life?