Develop Bugs

Maybe I have a serious Battery Problem (?)

Hi guys,
I was playin Temple Run and the battery was about 5% or however close to be fully discharged. Suddenly the display was flickering, or like something this. The phone suddenly powered off.
I tried to charge the phone with the charger in the plug, but after some seconds the animation disappears, then reappears in few seconds and disappears (about when the charger animation goes to the top for the second time).
The GN is connected to the PC, and does not power off: but the charger indication is stuck at 0%
What's happened? I doesn't made something wrong!! I used to discharge my battery often!
I also wiped Battery Stats in recovery, it does not helps.
The ROM and the Kernel are inte signature. I never made overclocks or something like this. Please help me
When I detach the USB cable from GNexus it power off (like when it's normally discharged)
EDIT: Suddenly the % went to 2%.

With lithium-ion batteries like the one in the Gnexus 'like' being charged. They do not have a memory like ni-cad batteries. Severely discharging or overcharging our batteries can physically damage them. If you store the battery for extended times, leave it at 30% charge.
As to why you experienced the freaking out from your phone, when batteries get low on charge, the voltage and amperage output drops. When your phone has a low draw, you won't notice this. Under high draw like gaming, it may not be enough to power your phone. Turn it off and plug it into the factory AC charger. Let sit for at least 30 min or so. Then try to power up.

Sqrls said:
With lithium-ion batteries like the one in the Gnexus 'like' being charged. They do not have a memory like ni-cad batteries. Severely discharging or overcharging our batteries can physically damage them. If you store the battery for extended times, leave it at 30% charge.
As to why you experienced the freaking out from your phone, when batteries get low on charge, the voltage and amperage output drops. When your phone has a low draw, you won't notice this. Under high draw like gaming, it may not be enough to power your phone. Turn it off and plug it into the factory AC charger. Let sit for at least 30 min or so. Then try to power up.
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Thanks. I charged the Nexus with the pc until 10%: now I'm using another plug chargher. Everything seems normal.

Temple Run sucks battery like a...you know.

adrynalyne said:
Temple Run sucks battery like a...you know.
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Yeah. In 30minutes of game the battery went down of about 10%. Web browsing in 3G is less battery expensive

Your battery might be damaged if its acting up when it gets low. Try not to run down to zero.
zippity doo da.

Whenever you get a chance, plug that phone in.
In the car on the way home? Plug it in.
Sitting in the office? Bring your charger and plug it in.
If its under 70% that is. A small charge will always be healthier than 0-100.
Sent from my Galaxy Nexus using XDA

i just experience the same thing i thought i burned out the phone home recharging it will help its look like it stuck on 0%
EDIT : its start recharge also
the way the screen flicker and the sound its made was just the scary

U2 vs U9

This is going to sound ridiculous, but I have to say it anyway.
I have a Samsung Galaxy S2 (SGH-i777), and I have two charging cables. A U9, and a U2.
When I charge the phone overnight with the U9 cable, I get a 100% rating on the charge, but the battery dies VERY fast. I unplug the phone at 7am, and it's down to 70% by 10am with very little use.
When I charge the phone overnight with the U2 cable, I get a 100% rating on the charge as well, but then the battery dies very slowly, the way I prefer it. I can use the phone moderately all day, and still have a good 30-40% when I get home after 5pm.
Clearly, I use the U2 cable, as this achieves my goal. My question is, why does it work this way? Is there something wrong with the U9 cable? Does it charge the battery differently than the U2?

Check what kind of charging the phone recognize "USB" or "AC". If it is USB the charging is slower (450mA) when AC is faster (650mA).

flash608 said:
Check what kind of charging the phone recognize "USB" or "AC". If it is USB the charging is slower (450mA) when AC is faster (650mA).
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I'm not quite sure what you mean. Is there a place in the menu of the phone to check for this?
I used to use the wall-outlet adapter with the U9 cable. Now I am using the same wall-outlet adapter with the U2 cable.

It`s hidden in Settings -> About Phone -> Status -> Battery Status (AC/USB)

Shibblet said:
I'm not quite sure what you mean. Is there a place in the menu of the phone to check for this?
I used to use the wall-outlet adapter with the U9 cable. Now I am using the same wall-outlet adapter with the U2 cable.
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When you connect the usb cable the phone says that is connected like a media device and a usb symbol appear in status bar and notification area, it means that are charging at 450 mAh (like usb connected to PC), but if only see a charging battery indicator then is charging at 650 mAh (like Power AC Adapter).
But I really dont know if the charge duration is affected, maybe is overcharging your battery. Try this, charge until 100% with both, but disconnect it when the phone says that charge is complete and try. Maybe with the time the battery is overcharged and has more battery with one of the cables.

At a molecular level, the slower charging is more thorough and actually deposits more charge (energy) into the battery, which is why a slow charge rate results in a better performing cell or battery. Remember, batteries (or cells; a battery is just a collection of cells) change energy from chemical to electrical when providing power, and accept energy when being charged by converting electrical energy to chemical energy. That chemical change doesn't happen instantaneously, and is why a slow charge can actually raise a cell or battery's energy level higher.
Generally, the charger measures the charge state of the battery by the voltage of the cell or battery, and charging slowly allows the charge to more thoroughly dissipate through the cell. Rapidly charging, on the other hand, builds potential (voltage) quickly, but the quick charging doesn't allow the chemical change to occur thoroughly throughout the cells, and misleadingly indicates a higher voltage (charge state) than has actually occurred.
Think of the game of Tetris: When the blocks (incoming electrons) are falling slowly, it's easy to pack them tightly and fit more into the play area (battery). When they're coming in quickly, eventually you become unable to fit them all tightly without leaving voids, and the height of the stack (perceived charge level, or voltage) reaches the threshold without being fully packed (charged).
I hope this helps, four years after the question --Mike Jernigan, Greensboro

EightOhMike said:
At a molecular level, the slower charging is more thorough and actually deposits more charge (energy) into the battery, which is why a slow charge rate results in a better performing cell or battery. Remember, batteries (or cells; a battery is just a collection of cells) change energy from chemical to electrical when providing power, and accept energy when being charged by converting electrical energy to chemical energy. That chemical change doesn't happen instantaneously, and is why a slow charge can actually raise a cell or battery's energy level higher.
Generally, the charger measures the charge state of the battery by the voltage of the cell or battery, and charging slowly allows the charge to more thoroughly dissipate through the cell. Rapidly charging, on the other hand, builds potential (voltage) quickly, but the quick charging doesn't allow the chemical change to occur thoroughly throughout the cells, and misleadingly indicates a higher voltage (charge state) than has actually occurred.
Think of the game of Tetris: When the blocks (incoming electrons) are falling slowly, it's easy to pack them tightly and fit more into the play area (battery). When they're coming in quickly, eventually you become unable to fit them all tightly without leaving voids, and the height of the stack (perceived charge level, or voltage) reaches the threshold without being fully packed (charged).
I hope this helps, four years after the question --Mike Jernigan, Greensboro
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4 year? You waited 4 year ???

Looking after battery

Hi all
Is there a definite answer to how you should charge your battery? Is it better to charge it before it gets to 40% like I have read or does it not really matter?
Also does charging it overnight do any damage?
Thanks all
Chris
Sent from my Nexus 7 using Tapatalk 4

The problem with battery care is that it has been tainted with old information that no longer applies to modern batteries.
The charging and discharging of the battery is tightly controlled by an IC to maximise life regardless of how you use it. All you need to be concerned with is making sure it doesn't sit fully discharged or fully charged for long periods (this is why when you first unbox a device it has about half charge)

Doesn't matter... just charge it when u think it s need to be charged...

High temperature is bad. Full charge is bad (charging 0.1V less than full generally doubles battery life). High temperature + full charge is really bad (negative synergies).
Overdischarge is bad as well, but if you stay above 3.3V or so, there should be no negative effect.
I have hacked my kernel to lower the charge voltage setting from 4.3V to a configurable value between 4V and 4.3V. I will release a kernel patch, once I have done some more testing.
BTW, a lower charge current is better for the battery as well. So if you have time, you can use a standard USB port (only provides 2.5W instead of 6W with the included charger) or add a USB extension cable/use a longer/thinner wire gauge micro USB cable (this will limit the power drawn from the included charger).

Put it this way:
You will have moved on from this device long before you would notice any battery problems caused by "bump charging", charging overnight, or any other normal charging behavior.
Check the Battery University for details about charging Lithium-ion polymer.

tni.andro said:
High temperature is bad. Full charge is bad (charging 0.1V less than full generally doubles battery life). High temperature + full charge is really bad (negative synergies).
Overdischarge is bad as well, but if you stay above 3.3V or so, there should be no negative effect.
I have hacked my kernel to lower the charge voltage setting from 4.3V to a configurable value between 4V and 4.3V. I will release a kernel patch, once I have done some more testing.
BTW, a lower charge current is better for the battery as well. So if you have time, you can use a standard USB port (only provides 2.5W instead of 6W with the included charger) or add a USB extension cable/use a longer/thinner wire gauge micro USB cable (this will limit the power drawn from the included charger).
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Gulp none of that made sense

chrisnewton said:
Gulp none of that made sense
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Then you need not worry about it. As I said, the battery is controlled by a fairly sophisticated IC, just charge it whenever you need to.

these batteries love refridgerators. you charge it when it comes to about 20-25%. I'm not compelling anyone, it's just that I've had this type of cycle since three years on my faithful ol' HTC Desire. Now its all burned, but I did have something to compare it with. My czn also got an htc desire a couple of days after i got it, and he is charge-freak. He charges his phone in his home, car, uni, bank, everywhere he can get his hands on a socket. The result: he's run down 4 batteries, and is on the brink of a 5th one. while I had only one throughout my three-year life cycle of my Desire.
So, try not to overheat your battery. Don't use it when charging. Charge it before you sleep at night, and let it rest for overnight. This overnight rest boosts battery life, and your charge will last almost 2 days. this is my personal experience speaking, and with the multitude of custom OC UV kernels out there, you might wanna go Chuck Norris with your battery.

Generally the most common way people damage the batteries is just by heat. Other charging ideals aren't really all that important in the grand scheme of things. The phone and chargers are smart enough to handle the other aspects.
Heat's a problem because the act of charging actually creates heat. So while you think it may not be too hot when it's charging in the mid-day sun in your car, it will be when it warms up from charging. It'll get so hot, in fact, that it may even refuse to charge, although you see this happen more on phones than tablets.
Also, don't leave your tablet dead for a month. That's bad. I don't think anyone does this, though, because what's the point of having a tablet if you leave it dead for a month?

[Q] Leave Galaxy Tab Pro plugged in?

My Galaxy Tab Pro 8.4 is on a stand on my desk most of the time. I usually leave it hooked up to AC power while on the stand. What's better for the battery: to leave it plugged in, so the battery remains at 100%, and only disconnect it from AC if I'm carrying the tablet around, or to not connect to AC while on my desk and let the battery drain slowly and recharge it, so actually go through drain-and-charge cycles? I've googled this, but I'm finding conflicting information. Are there definitive recommendations in this area?
Thanks!
--Ron

With mine I only charge it if the battery is 50% or lower, Leaving it plugged in with AC connected should be ok, I have a amper cable that shows power draw and when the Battery is fully charged the tablet pretty much draws 0mA with the screen off, and an occasional 20mA probably because of wake-locks or possibly trickle (unsure).
With that being said if the battery does fall below a certain voltage with it plugged it it might switch the charger back on to top the battery off and these micro charges can possibly wear the battery out though I'm not sure if it does this or if it trickles the battery (maybe ill monitor the logcat to see what the battery does when its plugged in)..
anyways key rules to lithium-ion battery's is never completely drain them, don't constantly charge them wait till 50% or less, avoid getting them too hot.

Charging tips

What’s the best way to charge the phone to maintain battery health?
1. Will Regular use of Warp charge cause any long term harm to battery?
2. Charging from ~10 to 100 (full charge) or keep it 30% to 70%
Other opinions say that newer batteries don’t need this kind of manual care,the circuitry takes care of it
Any tips?

I've had a lot of phones, cameras, and RC cars with lithium batteries (lithium ion in the first two and lithium polymer in the latter). Done a lot of research, and found out mainly lithium batteries don't like to be full or empty, they don't like heat, nor bring charged too quickly. People can say what they want about new tech, when I use any type of quick charge my phone gets hotter than if I use a normal 2.4a 5v charge.
I've read similar things about 30 to 70 or 80 percent, but that falls into the things I'm not willing to do category. I need my phone full when I leave for the day. And conversely, I don't like having my phone plugged in all night, if I go to bed at 9 it's full by 11 and sitting there at 100% until I wake up. To that end I bought a charger on Amazon for like $10 that shuts off once the phone is full. Sure, it's at like 96 or 97% when I wake up but whatever. Brand is 'Bull', it's white and has two buttons on the top to initiate the charge on either port. Been using it for three months and it works flawlessly.

toyboarder said:
I've had a lot of phones, cameras, and RC cars with lithium batteries (lithium ion in the first two and lithium polymer in the latter). Done a lot of research, and found out mainly lithium batteries don't like to be full or empty, they don't like heat, nor bring charged too quickly. People can say what they want about new tech, when I use any type of quick charge my phone gets hotter than if I use a normal 2.4a 5v charge.
I've read similar things about 30 to 70 or 80 percent, but that falls into the things I'm not willing to do category. I need my phone full when I leave for the day. And conversely, I don't like having my phone plugged in all night, if I go to bed at 9 it's full by 11 and sitting there at 100% until I wake up. To that end I bought a charger on Amazon for like $10 that shuts off once the phone is full. Sure, it's at like 96 or 97% when I wake up but whatever. Brand is 'Bull', it's white and has two buttons on the top to initiate the charge on either port. Been using it for three months and it works flawlessly.
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Or try Battery Charge Limit app, if you are rooted. It lets you set when the charging will stop. Mine stops at 80% and only charges again if it drops below 75%.

I mean you can worry about all this but in reality, how long do you plan to keep the phone? On avg phone batteries lose charging efficiency around 6 months from what I've seen. Also the phones hardware stops charging the batt at 100pct and runs on AC power after that while plugged in.
If you keep it for years and years, this is why they make replacement batteries even for iPhones so just don't worry and keep it charged if that's what you want

Galaxea said:
Or try Battery Charge Limit app, if you are rooted. It lets you set when the charging will stop. Mine stops at 80% and only charges again if it drops below 75%.
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I wish they would build that natively into Android. I don't generally root, but that's tempting. My laptop does something similar, desk use mode or something, stops charging at 60% and stays there. My wife's will actually let you set the upper threshold, Dell gaming G series I think.

Josh McGrath said:
I mean you can worry about all this but in reality, how long do you plan to keep the phone? On avg phone batteries lose charging efficiency around 6 months from what I've seen. Also the phones hardware stops charging the batt at 100pct and runs on AC power after that while plugged in.
If you keep it for years and years, this is why they make replacement batteries even for iPhones so just don't worry and keep it charged if that's what you want
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Click to collapse
This is actually true. (Y)

toyboarder said:
........ I don't like having my phone plugged in all night, if I go to bed at 9 it's full by 11 and sitting there at 100% until I wake up. To that end I bought a charger on Amazon for like $10 that shuts off once the phone is full. Sure, it's at like 96 or 97% when I wake up but whatever. Brand is 'Bull', it's white and has two buttons on the top to initiate the charge on either port. Been using it for three months and it works flawlessly.
Click to expand...
Click to collapse
Do you have a link for this charger?
Also, is a cable included?
THX.
Edit: Found it....
THX for sharing this @toyboarder ,much appreciated!
USB Wall Phone Charger, Power Port 2 12W 2.4A with Foldable Plug, BULL Ultra Compact Dual Port Travel Power Adapter for iPhone Xs/Max/XR/X/876/Plus, iPad,Samsung S4/S5 and More https://www.amazon.com/dp/B076F5NNV2/ref=cm_sw_r_cp_apa_i_dLDTDbBAYG1N0
Sent from my Samsung Galaxy Note Fan Edition using XDA Labs

Galaxea said:
Or try Battery Charge Limit app, if you are rooted. It lets you set when the charging will stop. Mine stops at 80% and only charges again if it drops below 75%.
Click to expand...
Click to collapse
KOLIOSIS said:
Do you have a link for this charger?
Also, is a cable included?
THX.
Edit: Found it....
THX for sharing this @toyboarder ,much appreciated!
USB Wall Phone Charger, Power Port 2 12W 2.4A with Foldable Plug, BULL Ultra Compact Dual Port Travel Power Adapter for iPhone Xs/Max/XR/X/876/Plus, iPad,Samsung S4/S5 and More https://www.amazon.com/dp/B076F5NNV2/ref=cm_sw_r_cp_apa_i_dLDTDbBAYG1N0
Sent from my Samsung Galaxy Note Fan Edition using XDA Labs
Click to expand...
Click to collapse
Yep that's it, I've bought a couple for techie friends too.