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hi!
i have a question regarding charing the battery. let's say the xperia z has something like 63% battery left. and i put it on the dock and let it charge up to 100% (or even less, e.g. 90%). and i do this quite often, will it some kind of "damage" or harm the battery, so that the battery life will decrease?
i mean the battery life doesn't seem to be that good, so i plan when coming home to put it on the dock, whether the battery is empty or not. and then when not used, leaving the phone on the doc.
thanks for your help & have a nice day
hebbe said:
hi!
i have a question regarding charing the battery. let's say the xperia z has something like 63% battery left. and i put it on the dock and let it charge up to 100% (or even less, e.g. 90%). and i do this quite often, will it some kind of "damage" or harm the battery, so that the battery life will decrease?
i mean the battery life doesn't seem to be that good, so i plan when coming home to put it on the dock, whether the battery is empty or not. and then when not used, leaving the phone on the doc.
thanks for your help & have a nice day
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I heard it's better than discharging to 0% and then charging it back to 100%. Not sure though
Al Gore said:
I heard it's better than discharging to 0% and then charging it back to 100%. Not sure though
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That was the case with old-style Nickel-Cadmium batteries, but no phone has used those in a long time. With modern Lithium-based batteries, regularly charging shouldn't be an issue.
Shasarak said:
That was the case with old-style Nickel-Cadmium batteries, but no phone has used those in a long time. With modern Lithium-based batteries, regularly charging shouldn't be an issue.
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thanks for all the answers.
so i can charge it as often and as long as i want, independent from its actual battery status? it won't lose power after time? even if i charge just from 70% to 75%?
hebbe said:
thanks for all the answers.
so i can charge it as often and as long as i want, independent from its actual battery status? it won't lose power after time? even if i charge just from 70% to 75%?
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It definitely will, my iPod is discharging quicker (at least it seems so) than a year ago when I bought it, and my current phone's battery (8 year old) can last like 20 minutes of talk time
hebbe said:
thanks for all the answers.
so i can charge it as often and as long as i want, independent from its actual battery status? it won't lose power after time? even if i charge just from 70% to 75%?
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It will lose power after time - all batteries do. You can charge it as long and as often as you want, it doesn't matter. If the battery loses its capacity - remember that Sony covered it under 24 months warranty and you'll get it replaced it its maximum capacity falls down under ~75% of its original capacity.
Akiainavas said:
It will lose power after time - all batteries do. You can charge it as long and as often as you want, it doesn't matter. If the battery loses its capacity - remember that Sony covered it under 24 months warranty and you'll get it replaced it its maximum capacity falls down under ~75% of its original capacity.
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Do they test it somehow or can I just go to Sony service center every 11 months and get a new battery?
Akiainavas said:
It will lose power after time - all batteries do. You can charge it as long and as often as you want, it doesn't matter. If the battery loses its capacity - remember that Sony covered it under 24 months warranty and you'll get it replaced it its maximum capacity falls down under ~75% of its original capacity.
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thanks.
but how do i determine if the capacity has fallen down under ~75%?
Al Gore said:
Do they test it somehow or can I just go to Sony service center every 11 months and get a new battery?
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hebbe said:
thanks.
but how do i determine if the capacity has fallen down under ~75%?
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There are free apps on the market that can assess your battery capacity. Of course if you're going to claim warranty - Sony will check it with more accurate methods, but even those free apps can measue your batterys's health quite accurately.
I'm not sure about the 75% number. Might be lower, might be higher. Usually it's set at 80% but i'd have to check that in the warranty itself ( will update the number when i get home )
Or do I need to let it die completely before charging? What do I need to do?
melted_cow said:
Or do I need to let it die completely before charging? What do I need to do?
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no just use it
melted_cow said:
Or do I need to let it die completely before charging? What do I need to do?
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use it fully untill it drains completely, then charge it to 100% , then use it fully 2 or 3 times and fully charge it.
then just use it like normal and charge like normal
Phil750123 said:
use it fully untill it drains completely, then charge it to 100% , then use it fully 2 or 3 times and fully charge it.
then just use it like normal and charge like normal
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That's an interesting dance that hasn't been relevant for over a decade. Interesting that you got a thanks but the correct answer didn't.
Phil750123 said:
use it fully untill it drains completely, then charge it to 100% , then use it fully 2 or 3 times and fully charge it.
then just use it like normal and charge like normal
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Please do not follow this advice. This used to be the best way to stop NiCad batteried from developing low capacity 'crystal memory' but it is not the case with LiOn or LiPo batteries, in fact, quite the opposite. Doing as he recommends is much more likely to damage the battery and even start a fire.
A LiPo shouldn't be discharged by more than 80% if at all possible. If you want to know more there are a lot of links on the interweb but here's a typical thread on stack exchange .. and a quote from it ...
http://android.stackexchange.com/qu...-first-time-charging-on-li-ion-batteries-myth
Nowadays, batteries are often Lithium-Ion or Lithium-Polymer and such batteries (as I have read many times and based on my own experience) would be stronger if you charge them often. The first time charging and "wait-until-full-discharge-before-recharge" and "don't-use-when-charging" are not applicable to these modern batteries.
Li-Ion and Li-Polymer batteries, if charged often, after about 1 month, would reach to their maximum performance, and you are recommended to charge them every time you find an outlet!
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and another ... http://android.stackexchange.com/qu...e-battery-discharge-fully-or-as-low-as-possib
radiotrib said:
Please do not follow this advice. This used to be the best way to stop NiCad batteried from developing low capacity 'crystal memory' but it is not the case with LiOn or LiPo batteries, in fact, quite the opposite. Doing as he recommends is much more likely to damage the battery and even start a fire.
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Wow, now we have the Richard Dawkins of battery advice. Well done.
Can everybody just calm the funk down and charge their batteries as and when they see fit? It's fine. Either way.
There is circuitry inside the battery that will prevent them from over charging, under charging, over discharging catching fire and generally behaving badly. There is also no memory effect. Just charge them when you think you'll need them.
Yeah just keep using it, if one day in the distant or not-so-distant future it doesn't turn on for some reason and/or seems unresponsive, it might need charging.
Phil750123 said:
use it fully untill it drains completely, then charge it to 100% , then use it fully 2 or 3 times and fully charge it.
then just use it like normal and charge like normal
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BenPope said:
Wow, now we have the Richard Dawkins of battery advice. Well done.
Can everybody just calm the funk down and charge their batteries as and when they see fit? It's fine. Either way.
There is circuitry inside the battery that will prevent them from over charging, under charging, over discharging catching fire and generally behaving badly. There is also no memory effect. Just charge them when you think you'll need them.
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Hmmm .. shows how out of date I can get ... I didn't realise that the overcharge protection had reached such a state of sophistication ... Personally I never bothered with battery regimes, even in the bad old NiCad days ...
Thanks for the correction.
The overcharging prevention was first introduced to the Sensation and EVO 3D phones. I remember when I started seeing it because I would leave for work, and sometimes my battery wasn't charged fully. What it was doing was charging to 100%, then stops charging and will let it discharge 5%, then start charging again. And it would keep doing it until I took it off the charger. I've yet to see my EVO 4G LTE do that, though. Maybe it's been refined so that we don't notice it as much?
eXplicit815 said:
The overcharging prevention was first introduced to the Sensation and EVO 3D phones. I remember when I started seeing it because I would leave for work, and sometimes my battery wasn't charged fully. What it was doing was charging to 100%, then stops charging and will let it discharge 5%, then start charging again. And it would keep doing it until I took it off the charger. I've yet to see my EVO 4G LTE do that, though. Maybe it's been refined so that we don't notice it as much?
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Wrong. Even early smartphones had overcharging protection. My old HTC Desire definitely had it.
BenPope said:
Wow, now we have the Richard Dawkins of battery advice. Well done.
Can everybody just calm the funk down and charge their batteries as and when they see fit? It's fine. Either way.
There is circuitry inside the battery that will prevent them from over charging, under charging, over discharging catching fire and generally behaving badly. There is also no memory effect. Just charge them when you think you'll need them.
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On the note of over-discharging: just because there is circuitry inside the battery to prevent over-discharging doesn't mean you should ever let your phone run down to (what your battery shows as) 0%. Yes, the phone will generally shut off when the battery is left at around 3v, but it's still possible to force turn your phone on (which you should never do) after that point. Not to mention, leaving the battery at a low voltage for a significant period of time WILL affect the overall lifespan of the battery. Battery manufacturers will do what they can, but there is really no such thing as "true" over-discharge protection, as with overcharge protection, since batteries will still lose charge even when not in service.
Yes, if you let your battery run down to (what your phone shows) 0% occassionally, that is OK. But you should really only be doing that if and only if you need to re-calibrate for cell mismatches.
Hah! I still remember when I bought a mugen battery the instruction clearly says to discharge it fully and charge it fully for like 5 times to get optimum capacity Obviously I didn't do it. I am much aware of these things since good old Nokia 3310 days.
I just got a "tip" from Motorola telling me that its best to charge my phone to 100% whenever I'm near an outlet and that they RECOMMEND charging the phone overnight to accomplish this. Are they trying to make my battery die quicker or something? Am I missing something about newer cell phone batteries that allow for constant recharging over the course of a single night without killing the battery?
Apparently, you can charge some of the newer phones and tablets overnight and not have to worry about overcharging. These newer batteries are supposedly able to stop taking charge once they reach full capacity. I've Google'd this a few days ago and several users on several forums from different sites are all saying the same thing. However, although you can charge it overnight without having to worry about overcharging, heat conduction while having the battery charge might be excessive enough to damage the battery.
I leave the phone on charger all night every night and i haven't really noticed any changes in battery.
Sent from my XT1056 using xda app-developers app
I've been doing this for years with no problems ever.
Sent from my XT1056 using Tapatalk 4
I've always left every single one of my phones to charge overnight. Do some people really take it off the charger as soon as it's charged? That seems like a waste to me, as you're using battery charge that you could otherwise be using throughout the day.
mrbradeli said:
I just got a "tip" from Motorola telling me that its best to charge my phone to 100% whenever I'm near an outlet and that they RECOMMEND charging the phone overnight to accomplish this. Are they trying to make my battery die quicker or something? Am I missing something about newer cell phone batteries that allow for constant recharging over the course of a single night without killing the battery?
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That Motorola tip is total BS. It doesn't matter whether you charge it to 100% and you certainly don't need to charge it overnight to accomplish that although it's fine if you do.
Good to know. Glad batteries aren't as finicky as they used to be.
Sent from my XT1053 using xda app-developers app
clankfu said:
That Motorola tip is total BS. It doesn't matter whether you charge it to 100% and you certainly don't need to charge it overnight to accomplish that although it's fine if you do.
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I think the newer batteries today become worse based on the number of cycles you put them through. Further, letting your phone only go donw to 80% before charging it back up again causes less strain on the battery and isn't a full cycle. The more cycles your phone goes through the less of a charge it can hold. This is why many people report to charge your phone as much as possible because it is actually better for you to leave it charging all the time instead of doing a battery cycle.
Many battery monitor softwares require you to recalibrate the batteries capacity to hold a charge after a certain number (often 30) cycle have been performed. And they consider cycles depleting your battery pass a certain percentage (ex. 70% or something). I did a decent bit of research a while ago and this was the information that I gathered from all of it.
jayboyyyy said:
I think the newer batteries today become worse based on the number of cycles you put them through. Further, letting your phone only go donw to 80% before charging it back up again causes less strain on the battery and isn't a full cycle. The more cycles your phone goes through the less of a charge it can hold. This is why many people report to charge your phone as much as possible because it is actually better for you to leave it charging all the time instead of doing a battery cycle.
Many battery monitor softwares require you to recalibrate the batteries capacity to hold a charge after a certain number (often 30) cycle have been performed. And they consider cycles depleting your battery pass a certain percentage (ex. 70% or something). I did a decent bit of research a while ago and this was the information that I gathered from all of it.
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Right. It is better to charge your phone as much as possible because your battery is capable of only a finite number of full cycles. My only contention is that it is not required that you charge it to the full 100%. In fact, they say that it's actually better for Lithium-ion batteries to hold partial charges.
Never charging the battery to 100%, nor depleting it to 0% will allow you to more get more out the battery overall. But keeping it on a charger means that you shouldn't even be using the battery.
I keep mine on charge overnight, and if I weren't worried about wearing out the USB port, I'd put it on a charger when in the car, while at my desk at work, etc...
Acc. To motorola cust. Care
mrbradeli said:
I just got a "tip" from Motorola telling me that its best to charge my phone to 100% whenever I'm near an outlet and that they RECOMMEND charging the phone overnight to accomplish this. Are they trying to make my battery die quicker or something? Am I missing something about newer cell phone batteries that allow for constant recharging over the course of a single night without killing the battery?
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SO i contacted motorola through help and they warned me to not charge my phone overnight every night because it would "DRAIN" my battery.
however they said it was ok occasionally
that's a bummer cos it is pretty convenient :/
shreymalhotra96 said:
SO i contacted motorola through help and they warned me to not charge my phone overnight every night because it would "DRAIN" my battery.
however they said it was ok occasionally
that's a bummer cos it is pretty convenient :/
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Sorry but whoever told you that is misinformed. No harm will come to the phone / battery from charging overnight unless you use a dodgy fake charger. I've charged all my phones overnight since my Motorola MicroTac in 1995 and have never had a battery / phone fail because of it.
All Motorola devices have good battery protection software, it won't hurt it to charge overnight. Short charging sessions are better for your battery but it makes no sense to worry about that either. The only way to hurt your battery is if you stuff a charge by letting it fill, then unplugging an plug it in several times. This can "top off" your battery and give you a little more charge but at the risk of damage and shortening your battery life. I personally don't recommend it. I have Anker backup battery if things get desperate or if I am out all day.
Sent from my HTC6525LVW using XDA Free mobile app
Well yeah, how about Apple doing it and everyone else pursuing? prolonged charging IS damaging your battery. If you use a Chargie device (https://chargie.org) during your overnight charging you might prevent this, since it delays and limits the charging pattern to a safe value. But otherwise nobody in 2021 recommends leaving your phone charging overnight.
Hi guys, good afternoon, how are you?
As I was looking after the Nexus 5 and the battery life of the device began to get discussed, I was unaware of the fact that nowadays we can just charge the device however we like, using Lithium-ion polymer batteries, different from the past, when a full recharge was recommended for the battery performance not get affected.
Considering that, for some users the battery life shouldn't be a concern, mainly for those who have a power outlet nearby, making an option to recharge it at any % level before getting it to fully recharge during the night.
I'd like to know from you guys: how do you recharge your devices? Do you wait for it to drain every % of the battery before recharging it or just plug it on the power outlet whenever needed?
Also, do you guys believe that recharging it at any % level does not affect battery performance?
Thanks a lot!
Modern batteries have a finite number of charging cycles before they being to lose performance. Generally speaking, 100%-0% is one discharge cycle, so if you want to maximize battery longevity you should do your best to minimize the number of discharge cycles you subject the battery to. It is not strictly speaking a direct relationship, but the battery should last longer if you charge it when it reaches 50% as opposed to 0% (that would qualify as "half" a discharge cycle).
When I'm using my device heavily and I have access to an outlet, I leave it plugged in. That saves on discharge cycles. Also, when I am sitting at my desk at work I generally keep it plugged in.
The following link is an excellent source of information regarding batteries:
http://batteryuniversity.com/learn/
right now with my current phone i'll usually just top it off after work from a wall outlet, or top it off in the morning when i wake up and get ready for work. i also have a usb cable at work to top off whenever needed throughout the day. i try to keep the battery over 50% most of the time, just because, but i rarely leave it plugged in throughout the entire night, and this is even with running sleep tracking apps. i imagine battery use/charging will be the same with the nexus 5 -- topping off in the morning while getting ready for work, maybe charge a bit while at work via usb cable, and topping off after work via wall outlet.
i guess i charge my battery in intervals throughout the day, instead of the daily 8 hour overnight charge. however, i usually keep it at least half full
Plug it in at night before I go to sleep.
If i'm using it heavily and it gets below 50%, I'll plug it in.
Some days at the office I'll plug it in about an hour before I leave so it'll be almost 100% after work.
If i'm going somewhere and feel I may run the battery down before I get home, I'll carry my portable charger with me (Anker 5600mAh).
matthewr87 said:
Modern batteries have a finite number of charging cycles before they being to lose performance. Generally speaking, 100%-0% is one discharge cycle, so if you want to maximize battery longevity you should do your best to minimize the number of discharge cycles you subject the battery to. It is not strictly speaking a direct relationship, but the battery should last longer if you charge it when it reaches 50% as opposed to 0% (that would qualify as "half" a discharge cycle).
When I'm using my device heavily and I have access to an outlet, I leave it plugged in. That saves on discharge cycles. Also, when I am sitting at my desk at work I generally keep it plugged in.
The following link is an excellent source of information regarding batteries:
http://batteryuniversity.com/learn/
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Wouldn't heavy usage while its charging put too much heat on the battery? Which is worse for it then worrying about charge cycles?
I do a backflip spin 360 before charging my phone...
thfreedumb said:
Wouldn't heavy usage while its charging put too much heat on the battery? Which is worse for it then worrying about charge cycles?
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It depends whether/how much heat is generated during heavy usage. On my N7 while browsing the net or watching videos the heat is non-existent. Certain games cause more heat than others. If the device starts to become "hot" then yeah, keeping it plugged in will only exacerbate the problem.
Also, having a case on the device can increase heat soak.
It depends on the situation.
You are right though that heat is the enemy when it comes to batteries. About an hour in my back-back on a beach on Oahu killed my GNex battery, and it was in the shade too.
I plug mine into a wall charger or my laptop...
At the end of the day though, if you don't bake or freeze your phone, the battery should last at least a couple of years without losing too much capacity I think.
The battery longevity discussion with mobile devices is similar to the oil change debate in automotive circles. Some people swear by certain brands and oil change intervals, whilst others just buy what is on sale and change the oil when the car tells them too. It probably makes very little difference in the end.
Yakandu said:
I do a backflip spin 360 before charging my phone...
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Mr.Mischief said:
I plug mine into a wall charger or my laptop...
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Smart alecks. Granted, I got a chuckle.
To OP:
Today's lithium ion batteries are way better than what they were 10 years ago. As posted above, go to battery university and learn all about it. My advice? Don't worry about special ways to charge your phone. You'll break, sell, or permanently store this phone long before your battery gives out due to charge cycles.
matthewr87 said:
Modern batteries have a finite number of charging cycles before they being to lose performance. Generally speaking, 100%-0% is one discharge cycle, so if you want to maximize battery longevity you should do your best to minimize the number of discharge cycles you subject the battery to. It is not strictly speaking a direct relationship, but the battery should last longer if you charge it when it reaches 50% as opposed to 0% (that would qualify as "half" a discharge cycle).
When I'm using my device heavily and I have access to an outlet, I leave it plugged in. That saves on discharge cycles. Also, when I am sitting at my desk at work I generally keep it plugged in.
The following link is an excellent source of information regarding batteries:
http://batteryuniversity.com/learn/
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This!
Once upon a time I used to wait till my phone drained to 0-5% before I charged it. But I quickly realized that doing so turned my battery into trash.
So now with my 2 latest phones I usually charge it when they are at 30-40% or higher if possible and not only do I get excellent battery time but also its lifespan & performance doesn't deteriorate over time.
Sent from my C6903 using Tapatalk
The only advice you need: DO NOT FULLY DISCHARGE LI-ION BATTERIES. These aren't NiCads, you do not need to power-cycle them periodically.
For best Li-ion life, try and avoid discharging below 20% or above 80%. Manufacturers will often add some 'headroom' to the 100% level (so that a battery that reads 100% is actually only charged to 80%-90% of capacity) in order to maximise longevity. within that range, charging and discharing will have little effect on battery life. charge and discharge rates do have an effect, but again ythe battery controller will limit these to prevent damage to the battery, so this is not something you need to worry about yourself.
Keep the battery topped up and avoid discharging it completely. Anything else is hocus-pocus or incorrect advice for the wrong battery chemistry.
i replace my phone once a year so i dont bother with saving the battery etc.. ive never had any measurable degradation to the battery the way i charge in less than a year. I usually charge it from what ever % its at to full. Most of the day at work it stays on my wireless charger, but it stops charging it after its full.
Thanks everyone for the feedback this far, in just a couple of minutes I already learned a lot.
Please let's continue the talk and vote if you can!
Thanks again.
On the charger before reaching 10%, around 20% or higher if it's possible.
EdZ said:
The only advice you need: DO NOT FULLY DISCHARGE LI-ION BATTERIES. These aren't NiCads, you do not need to power-cycle them periodically.
For best Li-ion life, try and avoid discharging below 20% or above 80%. Manufacturers will often add some 'headroom' to the 100% level (so that a battery that reads 100% is actually only charged to 80%-90% of capacity) in order to maximise longevity. within that range, charging and discharing will have little effect on battery life. charge and discharge rates do have an effect, but again ythe battery controller will limit these to prevent damage to the battery, so this is not something you need to worry about yourself.
Keep the battery topped up and avoid discharging it completely. Anything else is hocus-pocus or incorrect advice for the wrong battery chemistry.
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this +1.
I put emphasis on 'so this is not something you need to worry about yourself'.
EdZ said:
The only advice you need: DO NOT FULLY DISCHARGE LI-ION BATTERIES. These aren't NiCads, you do not need to power-cycle them periodically.
For best Li-ion life, try and avoid discharging below 20% or above 80%. Manufacturers will often add some 'headroom' to the 100% level (so that a battery that reads 100% is actually only charged to 80%-90% of capacity) in order to maximise longevity. within that range, charging and discharing will have little effect on battery life. charge and discharge rates do have an effect, but again ythe battery controller will limit these to prevent damage to the battery, so this is not something you need to worry about yourself.
Keep the battery topped up and avoid discharging it completely. Anything else is hocus-pocus or incorrect advice for the wrong battery chemistry.
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BoneXDA said:
On the charger before reaching 10%, around 20% or higher if it's possible.
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Thanks to this two people.
Before i read this, me always charge the @ 10% or below.
+1 :good:
I just discharge to 20%-40%, then charge it with the included charger overnight...
I've tried using slow chargers but didn't really make the battery any better.
I agree that discharging it fully is bad. Very bad.
I just charge it how it's mean to be charged and I don't have any problems
Sent from my Nexus 5 using Tapatalk
I've been charging wrong this whole time! Will start charging before I hit 10% from now on. Glad I saw this, just got a new phone and am hoping to keep it for as long as possible...
I charge it every night because I have to use it all day.
Sent from my Nexus 5 using Tapatalk
Hi guys. What are your ways, tips and suggestions for charging your z1?. Do you drain it completely and charge it fully afterwards? Or your the type of guy who partially charge and discharge often? And whats the best way to do the charging?. Thanks!
shizurushu said:
Hi guys. What are your ways, tips and suggestions for charging your z1?. Do you drain it completely and charge it fully afterwards? Or your the type of guy who partially charge and discharge often? And whats the best way to do the charging?. Thanks!
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to keep the battery life longer,better charge it after reaches 20% of battery
Ben Ling said:
to keep the battery life longer,better charge it after reaches 20% of battery
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Oh and what about the 'better to unplug it before it yets full' thing. Is that even true?. And is it bad tobusevit while charging?. Thanks!
shizurushu said:
Oh and what about the 'better to unplug it before it yets full' thing. Is that even true?. And is it bad tobusevit while charging?. Thanks!
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yes also unplug it after full to prevent battery from damaging
Ben Ling said:
yes also unplug it after full to prevent battery from damaging
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Okay thanks for the info!. My battery is not good. Its only 3day old and it drains very quickly. I never imagine how it drain so fast because its a 3000mah battery.
shizurushu said:
Okay thanks for the info!. My battery is not good. Its only 3day old and it drains very quickly. I never imagine how it drain so fast because its a 3000mah battery.
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Normally it drain fast if you are playing games or browsing internet
due to it's 1080p screen,battery will be drained more fast.
Ben Ling said:
Normally it drain fast if you are playing games or browsing internet
due to it's 1080p screen,battery will be drained more fast.
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Hi again! I attached some screen shot. Is my battery bad?
ur battery is ok....i charge my phone overnight..its nt a prob...
Sent from my C6902
Ben Ling said:
yes also unplug it after full to prevent battery from damaging
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I think the battery has overcharging protection, so it won't overcharge and damage it, so leaving it on charger during night, even if the battery reaches full level, is not going to cause harm.
Also, using the phone while it's charging, won't damage the battery.
Useful battery info HERE.
Thanks! I thought may battery is bad. 43% in 3hours the screen was on. XD
Best way to charge:
Quoting from http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries:
Code:
A portable device should be turned off while charging. This allows the battery to reach the threshold voltage unhindered and reflects the correct saturation current responsible to terminate the charge. A parasitic load confuses the charger.
Charge at a moderate temperature. Do not charge below freezing.
Lithium-ion does not need to be fully charged; a partial charge is better.
Chargers use different methods for “ready” indication.
The light signal may not always indicate a full charge.
Discontinue using charger and/or battery if the battery gets excessively warm.
Before prolonged storage, apply some charge to bring the pack to about half charge.
Over-discharged batteries can be “boosted” to life again.
Discard pack if the voltage does not rise to a normal level within a minute while on boost.
also see: http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries