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Ok i am using the p3300 as a covert tracker and have installed a large external LI-PO battery, not the LI-ION that is normally used in the phone.
Because the li-poly battery can be discharged to a lower voltage before it is considered low battery, than a li-ion battery, id like to be able to set the switch off voltage level to be lower, before the unit switches off. so that a can fully use the power in the battery. As it stands with the large battery (8800 Mah 4 2200 Mah cells in parallel) windows is shutting the unit down before the battery is discharged. I think this is around 3.6 volts , but the LI-Poly battery can be discharge to around 3v under load before its considered flat. and im only using around 60% of the batterys power like this.
Is there any way to change this in the registry, so that i can fully discharge the battery and get a longer life out of it. I'm sure i read something like this on here a year or so ago, but i cant find any info now.
Very interesting post. I'm not sure if you can modify that value in the registry but I'll try to dig on it and let you know if I find something.
I'm using a CECT W800 which is a clone of HTC P3300 and have a problem with the battery when using it as GPS on the car. To be more exact the battery gets depleted even with the charger on in about 2 hours or so. I thought about trying to replace the battery with a more powerful one (even if I would have to put it outside of it) but got stuck when I found out that it needs to be a compatible battery in terms of communication protocol. Do you know more about this? Can you please give me some details or hints?
Thanks.
Hi!
I'm looking for an application, that quickly kills my battery if it's low, so I can do a full charge to improve battery life.
Something, that I launch, I put my phone on the desk, have a tea meanwhile, and it's drained! Something, that turns on wifi, do some downloading, browsing, video playing, or whatever, and does it automatically without supervision. Does such app exists?
I'll second this, it'd be nice to have an app do this for me and maybe even give us some interesting stats from it?
Sent from my mind using telepathy
why would you want an application to destroy your battery?
Adevem said:
why would you want an application to destroy your battery?
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Apparently if you do a full discharge the battery life will be longer.
Soniboy84 said:
Apparently if you do a full discharge the battery life will be longer.
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Click to collapse
not really, you should avoid deep discharges...
Byr0x said:
not really, you should avoid deep discharges...
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Click to collapse
+1 If you had been reading around...you would know Lithium Ion batteries are designed to 'maximize' their efficiency within about two weeks of 'top up' charging. Cycle-charging is generally considered a less efficient method of charging. You will need to 'TopUp charge' this means charging as much and as often as possible. If your battery is at 89% for instance and you find yourself near a socket, plug your adapter in and charge it up to 100%. After a few days of doing this you will notice an improvement in the life of your battery when you are not able to charge.
Actually,,,
It is not matter of running your battery down to 0%.
It is ok to run it down till phone does to power on itself.
As you know battery is a single cell Li-Ion @ 3.7v
when it is fully charged it's peak voltage is 4.2v
By the time battery mah is drained down (galaxy s has 1500mah)
battery voltage should be around 3.2~3.4v range. this will depend on condition of the battery.
Battery should never go below 3.2v personally, 3.4v is my cut off.
If your battery voltage goes below 3.2v... it's time for a new battery as this kind of voltage will damage your battery, either it will leak or puff (battery will actually get bloated.
Phone has a voltage cut off so it will not over charge over 4.2v but if it does, it will likely start to smoke and catch fire.
I am sure anyone who is into electric Radio control knows all about these batteries.
Oh btw,,, long time storage voltage should be 3.8v
You'll be asking how do I know what voltage my battery is... I personallly don't know of any apps but GPS Status actually shows the temperature & voltage of your battery.
Soniboy84 said:
I'm looking for an application, that quickly kills my battery if it's low, so I can do a full charge to improve battery life.
Click to expand...
Click to collapse
First, take into consideration the comments above regarding deep discharge of your battery...but, to answer your question, there's an app in the market place called 'Battery Refresh' which attempts to drain your battery quicker.
Well if it's all true above than its a good sign, and thanks for the info! I'm not an expert but in the old times I remember batteries had to discharged completely, maybe even if it's just a few times. Now somebody can also tell me why my battery is discharging when it's plugged in the socket with original charger? All I do is using the internet, and has. nimbuzz and a live wallpaper on. :S
You could probably enable the GPS/BT/WIFI ( connected to a router ) and run the interactive mode on Neocore benchmark.. that should enable most of the hardware components on the phone and stress the GPU/CPU.. probably would see a 25% battery drain for every 35-40mins.
I don't know what has changed with the batteries but as far as I know...
it is good to discharge new batteries 3~4 times down until phone does not power on.
Like I have said... it's about the voltage of the battery, not whether battery has any juice left in it or not.
These batteries have a protective circuitry so that it will not charge over 4.2v,
also as for discharge it is usually down to 3v but usually with a charger/discharger units that can control mah/volts/amps. With typical usage from the phone, it'll likely be discharged down to about 3.2`3.4v. Which is very safe.
You can do whatever you feel but I personally do this to every batteries I have for phone and every batteries I use with my radio controled cars.
For my RC cars, I have about 6 batteries ranging from 1cell to 3cell LiPo packs.
Each cell is 3.7volts.
But you don't have to force discharge and hurry the process.
Just use the phone normally and let it run down to nothing... than recharge to full peak.
Than again, choice is yours.
I'm looking for the same kind of applications. It's very useful for recalibrating your battery. Wipe the battery history then do a full cycle.
Sent from my GT-I9000 using XDA App
The old saying in RC Helicopters was that the difference between discharging 50% and 100% was the difference between getting 500 uses and 5 uses.
You should certainly avoid ever fully dischaging any lithium based battery.
Older nickel batteries (Ni-cd, Ni-MH) required full dischage cycles to get rid of memory the the metals pertained, lithium-ion and lithium-ion-polymer not only do not require this; but doing so will damage them.
And yes, the older ipods came with Nimh cells and they did reccomended full discharge cycles.
Im pretty sure the idea was to try not to let the voltage get below 3.5v/cell and never below 3.3. Dead flat is 3 or 2.85 which is when the battery simply cant produce any real current. The phone should have circuitry though to not let the voltage get above 4.25 or below ~3.5.. If the low battery warning comes on, set the brightness to dim, and stop any activities (unless its a phone call, its not THAT important but if youre playing games or watching a movie...) until yo can get to a charger.
By the way this being my first post (i meant to ages ago) Ill just mention that my galaxy S came with recovery mode and download mode Enabled, i got it just last month, Virgin network, Australia.
draining the battery fully was for the older battery types, new age batteries are not recommended to be drained fully
Thanks!
One more question:
I'm using my phone as a desktop replacement, because I don't have Internet at the moment. I'm using xda, dolphin browser and listening music. It's plugged into the mains and it's not charging. It says 49%, and stuck there. Is it possible I'm using too much battery?
Sent from my GT-I9000 using XDA App
Ok, this will be my last reply.
Fully draining or not is not the issue.
In RC, most modern electronic speed controllers have a built-in battery cut-off which will cut off power once it reaches certain voltage. Because OVER-draining battery without cut off can damage/kill/ or make it unable to hold voltage.
Also, once the battery voltage reach certain point (still within safe range) you will notice the motor being powered slow down. This would also be a recommended time to stop.
Cellular phones have built in safe cut off aswell. As I have said I have measured my battery after being full drained, voltage was around 3.55v or so. Which is very normal considering voltage of the battery is 3.7v only with peak charged voltage of 4.2.
Now, Someone mentioned that fully draining your battery repeatedly will dramatically reduce battery life.
Reducing life of the battery has more to do with the amount of AMP used to charge the battery. Faster charging is usually reduce battery life dramatically.
And without hobby grade chargers, you won't be able to control this charge rate.
Slow charge is better but charging at 1C rating is the normal. But charging at 1C means regardless of batteries mah rating, battery can be charged in about 60 minutes. As we all know, our phone batteries doesn't charge from zero to full in 60minutes, right? just like most of the portable devices it takes nearly 3~4hours to fully recharge. Last 20% usually takes longer because Amp provided to charge slowly lowers. That is why.
For example, if Galaxy S battery is 1500mah, than 1C charge rate is @ 1.5amp.
If battery is 3000Mah, 1C is 3.0Amps and so on.
So like I have said over and over before, drain your battery away if you have to by choice or not. Just use it up, I will bet you your battery will last longer than you keep your phone.
U should avoid draining ur battery to 0% (witch is not possible with ur phone. When it shows 0% the charge of the battery is at 10-15%). Li-ion batteries dont have a memory effect, so it would be usless discharching it completely anyhow. Best for sgs battery is charging it before it goes under 50% that will improve the lifetime of ur battery (not how long it lasts before u have to charge but how long it lasts before u have to go and buy a new one)
How do i know? Simply cause i had to learn that a few weeks ago for the job im learning.
@xxgg: yes ur right, it wont really damage the battery if u runn it till thr phone shows its empty. But using an app to drain battery as quick as possible will, since the app forces the battery to give out more Ampere than its built to give out
Sent from my GT-I9000 using Tapatalk
whats the latest on the battery? i've read a lot of posts here about shutdown but not really found an answer. i have 2 different batteries, std 1350 and a 1600 which i swap as needed so i dont expect the battery meter to be really accurate, but it seems that either battery goes from about 25% then just dies. not sure if it actually shuts down cleanly on low power but certainly there is no warning.
apart from carrying a spare (which i do) whats the best work around?
i've no idea what a real android phone does when the battery is low.
in theory android shutdown the phone before the battery level is too low.
But on low battery values or when you switch between battery the kernel hasn't a good battery level resolution, so the battery run out before android can shutdown.
gazzacbr said:
whats the latest on the battery? i've read a lot of posts here about shutdown but not really found an answer. i have 2 different batteries, std 1350 and a 1600 which i swap as needed so i dont expect the battery meter to be really accurate, but it seems that either battery goes from about 25% then just dies. not sure if it actually shuts down cleanly on low power but certainly there is no warning.
apart from carrying a spare (which i do) whats the best work around?
i've no idea what a real android phone does when the battery is low.
Click to expand...
Click to collapse
The kernel re-calibrates the battery level based on voltage and current when it first boots after the battery has been removed. The calibration is not very accurate, and might be off by 10 or even 20 percent. But, when the voltage drops low enough, the kernel will calibrate the battery level again, and you should see it reading under 5% before it dies. The actual shutdown happens when the battery sensor detects 3V or less. In the kaiser, that doesn't seem to be controlled by the kernel, so I think we can't do anything about it. I don't think we want to, either, since it is quite bad to run a Lithium Polymer battery at less than 3V. It would be nice to have an interrupt at 3V instead of an abrupt shutdown, so we could do a clean shutdown. Except, of course, we haven't yet figured out that clean shutdown.
If your kernel is older than November 6th, or if you use 2.6.25, you should update to a more recent 2.6.32 kernel for better battery readings.
Hi,
I've just purchased a couple of cheap batteries off ebay and just wondered what was the best way of using them and charging them?
I've just recently calibrated the battery on the Z the other day (and now been getting upto 22 hours on a single charge! Yay!) and wondered do I need to do the same for the batteries I just bought as they come with their own charger.
I just want to get the best out of the phone and batteries so wanted to know what's the best thing to do.
Thanks in advance,
Jason
I would run them flat (keep phone on until it dies, turn it back on, let it die, turn it on, let it die, turn it on...... until it boots no more) before charging fully/overnight.
Batteries aren't calibrated, the battery meter on the phone is calibrated (basically, so the volt meter on the phone knows what voltages correspond to "full" battery and "empty"). Li ion batteries don't need to be conditioned like the old NiCad type. Really, you don't need to do anything. Li ion batteries should be stored with about 40% charge according to the link below. They should have shipped with some charge, and hold the charge pretty well. Just check them once in a while if stored for a long time.
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
wileykat said:
I would run them flat (keep phone on until it dies, turn it back on, let it die, turn it on, let it die, turn it on...... until it boots no more) before charging fully/overnight.
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Click to collapse
No! Do not run the batteries until empty. Running a Li ion battery empty can possibly cause it to no longer take a charge. Try not to discharge below 20%. See the link below. The proper way to calibrate the battery meter is charge to full, drain to about 20%, repeat a couple times.
http://batteryuniversity.com/learn/article/do_and_dont_battery_table
And as I've already mentioned in my previous reply, charge/drain cycles on the battery does nothing does nothing to the battery itself. Li ion batteries don't need to be (and can't be) conditioned. Charge/drain cycles only calibrate the battery meter on the phone (possibly incorrectly, if you are just going to then store that battery). So you are just wasting your time.
Also, you shouldn't store the batteries fully charged.
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
Really?....
Links added to 'to do' list for later. Thank you pal. I really should research before taking peoples word as gospel.
Nice one.
What I've done is counter to what people always say about Lithium Ion batteries but I've had good success so I figured I'd share.
I have two batteries, one always lives in the phone and the other lives in an external charger (these can be had for as little as $5 on eBay).
Every morning I look at the phone and if the charge is <50% I pop the other battery off the charger and put it in my pocket. When the phones battery dies (may not be that day) I just swap the battery and when I get home I put the dead one on the external charger.
Periodically if I'm not in a hurry, I will even go so far as to power the phone on in recovery mode after the battery has died, it will run for a bit longer in recovery (sometimes as long as an hour) sucking a little bit more juice out of it.
I routinely get more than 2 days out of a battery charge.
I don't doubt that my method reduces the overall lifespan of my batteries but charge time is more important to me than battery lifetime and I end up picking up a new battery every 6 months ago and taking my oldest one out of service.
wileykat said:
Really?....
Links added to 'to do' list for later. Thank you pal. I really should research before taking peoples word as gospel.
Nice one.
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Click to collapse
No problem. I used to think the same, about draining the battery until the phone died, then charging to full, to calibrate the battery meter. Until Jackos over in the Rhodium forum informed me otherwise. I've also read pretty occasional posts over there (and likely other phones) by various users that discharged their battery too low, and then couldn't start their phones or charge the battery. Every phone is different, and I think a user on here said the Vision has better safety measures to prevent this. But best to play it safe. There is really no benefit to intentionally draining your battery to 0% versus 20%. Your battery meter will still be plenty accurate enough.
Ah ok thanks guys a lot of useful info here.
So to sum up:
- I can charge the batteries normally on the phone without need for calibrating either phone or battery.
And one more question:
- Are there adverse affects from charging the official battery or ebay batteries on the external charger?
Loving the Desire Z at the moment, I think I'll have one spare battery on me when at work or commuting on public transport and one in the car.
Thanks again!
BiMU said:
- Are there adverse affects from charging the official battery or ebay batteries on the external charger?
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Click to collapse
They both charge fine either on the external charger or in the phone but in general I've had better performance with OEM batteries than with the generics, I suspect that there is a wide range or quality among generic batteries where the OEMs are more consistent.
Right now I have one OEM and one Generic, despite the Generic having a higher MAh rating and being newer in general I get more time on a charge off the OEM battery.
You can check eBay for a good deal on OEM batteries, just be sure to read the item description carefully to make sure you are getting a real OEM battery as opposed to an "OEM-type".
BiMU said:
So to sum up:
- I can charge the batteries normally on the phone without need for calibrating either phone or battery.
Click to expand...
Click to collapse
If you are going to be swapping batteries frequently, then I would say that there is no point in calibrating the battery meter on the phone. Its never going to be completely correct if you keep swapping the battery. If you are going to use one battery for a long time, I'd say calibrate the battery meter. There is no such thing as calibrating the battery, so obviously no on that.
BiMU said:
And one more question:
- Are there adverse affects from charging the official battery or ebay batteries on the external charger?
Click to expand...
Click to collapse
I'm not sure on this, so maybe others have a better answer. But I'd say as long as the voltage is the same, it wouldn't matter if you used the phone or an external charger to charge the batteries.
From what I've read, Li ion batteries have safety circuitry to prevent over-charge, so you don't need to worry about the charger having that.
Under mango or one of the firmware updates which had been updated recently , u will see yr battery saver is fluctuating , at one time saying u have a 1 day, while another time it says u only 2 hours on a reasonably fuller charge.
there is a problem with HTC original batteries, rather i will say a safety regulation after recent incidents with battery safety
yr htc only charges up to 85% level even though the phone indicator shows 100%
when u unplug it from the charger, it immediately drains and stays at 80%.
THis is likely why the HTC phones have a shorter battery life, whether its android or windowsphone 7
this is not a defective battery, its made intentionally by HTC for 2 reasons 1) safety , 2)battery longevity ,the safety mechanism built in stops charging it to 100%, thus overcharging, overcharging means the battery is out thru stress which may pose a hazard. if a battery is fully charged to true 100 % , it poses a hazard if one of the pins in the phone connectors break. apparently this pin tells the charger or the phone not to charge anymore once reaching 100%. there is a possibility that if this pin breaks, the phone will overcharge and pose a safety hazard. So this is why HTC batteries dont charge to true 100% and this particular pin is tweaked to full charge to only 80%
wheareas, mugen batteries ect do not have this safety regulation or charging limit although they are safe to use, so they seem to last 20% more than stock HTC battery because they fully charge to 100%.
Mugen or other reputed aftermarket batteries are more likely to wear out sooner than stock batteries unless depending on the quality of the battery..
in order to get yr HTC battery to full charge it u need to bump charge it.bump charging is a technique to fully charged the battery closer to its real capacity
to bump charge
1) fully charge the battery from 20% to 100% , as indicated by the phone OS
2) turn off the charger, turn on again, u will notice the phone charges again even though its 100% full for 1/2 a minute. wait for it to fully charge
3) repeat the above step 2) for 10 times
4)use a timer plug to simplify the process. Set the timer plug to on/off every minute for 10 times. u need to get a digital timer for this purpose with mutiple timer settings
Magpir said:
yr htc only charges up to 85% level even though the phone indicator shows 100%
when u unplug it from the charger, it immediately drains and stays at 80%.
THis is likely why the HTC phones have a shorter battery life, whether its android or windowsphone 7
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Click to collapse
Interesting. I noticed this with my HTC Mozart; battery indiactor drops one bar (to 80-85%) as soon as I take it off charge. Always assumed it was a WP7 thing - like it was drawing a lot of current.
Where did you get this info from? Looks like I'll be ordering a new (non-HTC) battery asap!
If it's true i won't buy a plug timer but a new battery, not from HTC...at least i hope it's true caus my battery capacity sucks and that gives me hopes, enjoying my hd7 more than a half day without plugging it (when it's possible)...so nuff thanks for the tip.
Sent from my HD7 T9292 using XDA Windows Phone 7 App
Funny, I have always done this with every device (maybe not the x 10 repeat!). never knoew that was the reason though thanks!!
not only HTC, there are couple of other devices like samsung galaxy ect
now u know why they claim mugen and other aftermarket batteries last longer...
mugen 1500 mah battery with the same size as the stock 1230 mah batt>
thats bull..because a 1500 mah battery looks much bigger ... the samsung omnia 7 has a 1500 mah battery and its 30% larger than than the HD7 battery....
Aphasaic2002 said:
Interesting. I noticed this with my HTC Mozart; battery indiactor drops one bar (to 80-85%) as soon as I take it off charge. Always assumed it was a WP7 thing - like it was drawing a lot of current.
Where did you get this info from? Looks like I'll be ordering a new (non-HTC) battery asap!
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Click to collapse
thats because the battery stops charging once it reaches 85%
u may have heard of the HTC bump charging technique. thats what this si all about , but u need to do it everyday, so get a timer plug and leave it to do its job overnight everyday
the best is to use a digital programmable timer plug .
Ok, had a google and looks like your post is only partially true:
http://phandroid.com/2010/12/25/you...is-lying-to-you-and-its-not-such-a-bad-thing/
Appears it's an issue with all smartphones, not just HTC! Also bump-charging will dramatically reduce battery life.
As someone in the comments says; why can't the phone just stop charging and switch to running wall power once battery gets to 100%, same as laptops? I assume this is what Apple do, as the iPhone doesn't suffer from the same issue.
Interesting because I have no problems with my battery doing that running Mango beta 7712 on my HTC 7 Pro.
The moment I take my battery off once it turns green, it stays at 100% for hours if there's absolutely no activity on it.
I think it's how far you guys are draining your batteries. Ever since I've gotten my phone, only twice did I push the battery lower than 15% charge; once on accident and another to recalibrate it. After that, I never pushed it lower than 15% and made sure to only recharge it after at least a good 20% of usage (days i feared i wouldn't be near a charger and needed full charge).
Granted, I'll add that it maybe be because I swap the battery out every other night with a spare, and if I do so I make sure there's between 50-58% charge left.
No bump charging either.
ScottSUmmers said:
Interesting because I have no problems with my battery doing that running Mango beta 7712 on my HTC 7 Pro.
The moment I take my battery off once it turns green, it stays at 100% for hours if there's absolutely no activity on it.
I think it's how far you guys are draining your batteries. Ever since I've gotten my phone, only twice did I push the battery lower than 15% charge; once on accident and another to recalibrate it. After that, I never pushed it lower than 15% and made sure to only recharge it after at least a good 20% of usage (days i feared i wouldn't be near a charger and needed full charge).
Granted, I'll add that it maybe be because I swap the battery out every other night with a spare, and if I do so I make sure there's between 50-58% charge left.
No bump charging either.
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Click to collapse
yes its better to maintain 20% charge .
If u noticed the iPhone batteries wear out faster.
About year or so.
Just to confirm I have used the timer plug technique twice the last 2 days .
This is what I have
30% charge
8 hours since last charge
Moderate usage.
Somehow those who claim to use momax or mugen batteries claim to have the same results above .
the charge-controller is in the phone not the battery.
schranz01 said:
the charge-controller is in the phone not the battery.
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Click to collapse
apparently it still the battery...
up for awareness.....
My HD7 doesn't do this. Tried several times even over a 5 minute span keeping the battery indicator in view. It never dropped to 80%.
---------- Post added at 08:57 AM ---------- Previous post was at 08:54 AM ----------
Magpir said:
yes its better to maintain 20% charge .
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Click to collapse
You should not let Li-ION batteries fully discharge, ever. It's good to keep it on a charger whenever you can, than keep it off a charger and let it fully discharge. That wears the battery out.
Also, there's no risk in overcharging the battery because almost all decent phones will stop charging when the battery is full. They know when to stop charging, just like they know when to alert you that the battery is fully-charged (via a notification and/or changing the LED Notification light color).
You actually can overcharge it by exposing a fully charged battery to higher temperatures - putting the phone in direct sunlight or setting it in a car holder in the way of hot air from the heater deflector while using Satnav, for example. In order to avoid these conditions, controllers do prevent batteries from 100% charge. That being said, I don't think there's a standard for marking battery capacity, and an honest manufacturer should put real effective battery assembly capacity accounting for those limitations, not the sum of capacities of included cells. Don't think they do it really.
vangrieg said:
You actually can overcharge it by exposing a fully charged battery to higher temperatures - putting the phone in direct sunlight or setting it in a car holder in the way of hot air from the heater deflector while using Satnav, for example. In order to avoid these conditions, controllers do prevent batteries from 100% charge. That being said, I don't think there's a standard for marking battery capacity, and an honest manufacturer should put real effective battery assembly capacity accounting for those limitations, not the sum of capacities of included cells. Don't think they do it really.
Click to expand...
Click to collapse
Yea, its like computer hard drives and flash cards....Formated they never will be the size your quoted or paid for.
I wish there was standards for this and it's only sold on the actuall usable space or time.
N8ter said:
Also, there's no risk in overcharging the battery because almost all decent phones will stop charging when the battery is full. They know when to stop charging, just like they know when to alert you that the battery is fully-charged (via a notification and/or changing the LED Notification light color).
Click to expand...
Click to collapse
It's actually still not good to leave li-ion batteries plugged in when they are fully charged and stopped charging. They will suffer from capacity loss that way as well. Not to mention any heat coming off the device.
Update: i did not bump charge today..
and the old symptom returned again.. draining fast