I have been charging my phone via usb connected to my laptop ever since I got the phone and I noticed I was not getting the amazing battery life on Nero v3 that others reported. I ran across a thread that said something about charging from the stock wall charger to improve your your battery.
Well I decided to drain my battery after installing Nero v4.1 and charge it fully on the wall charger. Since doing this I have 51% battery at a point in the day when I would normally have 30% or less.
My question is has anyone else noticed this? Or tried it?
Sent from my SGH-T959 using XDA App
Your laptop may be limiting the current to the USB in power saving (typically if running off battery). So yes it is entirely possible for that to happen, and it would confuse the phone. Then it would not be able to re-align its battery capacity guess until it starting drawing from it again.
You can try turning off the option on the USB ports/controllers that says "Allow windows to turn this device off to save power". (If your using windows, I have not seen MACs with the power save issue).
Note: Some PCs use "hubs" for the external USB interfaces (ports). This can also cause a lower current to non self-powered devices.
Is there a way (app or hack) to enforce android to ask whether to charge or not when plugged to usb port?
It's kind of annoying that every time I connect the phone to pc it starts to charge up.. it can't be 'healthy' to the battery, can it?
WiCiO_MeDi said:
Is there a way (app or hack) to enforce android to ask whether to charge or not when plugged to usb port?
It's kind of annoying that every time I connect the phone to pc it starts to charge up.. it can't be 'healthy' to the battery, can it?
Click to expand...
Click to collapse
It's perfectly "healthy" for LiION battery. The "it's not good to charge it before it's dead" ideology is a left over from the old days of the NiCad and N-MH and other rechargeables.
Yes every once in a while all the experts say to drain your phone battery dead and recharge it.
Otherwise, unless it interferes with your programming or development just leave it alone. It will not hurt your phone or battery.
Now, I am sure there is someone who has/will write an app that will allow your phone to ignore it was even plugged in, and that is also OK for your phone.
WiCiO_MeDi said:
Is there a way (app or hack) to enforce android to ask whether to charge or not when plugged to usb port?
It's kind of annoying that every time I connect the phone to pc it starts to charge up.. it can't be 'healthy' to the battery, can it?
Click to expand...
Click to collapse
I'll add that it's actually better to not fully discharge - As Ibizian said, Lithium Ion does not have a charge memory and factors such as storage temperature have a higher impact. The only reason to discharge fully is to calibrate the 'fuel gauge' for the battery.
here's a good article on the subject:-http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
@drengur
Great article, thanks!
Now I'm much more educated about batteries
Judging from the text my question is now misplaced and my phone charging habits a bit archaic..
Hi,
I read about peoples Tab wouldn't charge and they can use a script to enable USB charging.
I need to disable USB charging as I want my battery fully and continuely charged for battery lifes sake without getting small charges whenever connected via USB to the PC.
How can I achieve this?
Please use the Q&A Forum for questions Thanks
Moving to Q&A
disable USB charging?!? new lithium ion batteries aren't as sensitive to partial charges as previous generation nickel cadmium batteries: Link It may be better to keep your battery at 100% with charging to prevent the number of discharges of your battery.
back to your question:
you do not have to do anything if you do not have the tab rooted and script installed.
if you are rooted and have the script installed, you will have to go to script manager, find the script, uncheck "Boot", and restart.
Hope this helps.
xdatroxx said:
Hi,
I read about peoples Tab wouldn't charge and they can use a script to enable USB charging.
I need to disable USB charging as I want my battery fully and continuely charged for battery lifes sake without getting small charges whenever connected via USB to the PC.
How can I achieve this?
Click to expand...
Click to collapse
You need to update your information on battery technology. But if you really want to disable USB charging (assuming you're on a ROM that has enabled it) just go to the second post in the Galaxy Task thread in the dev section.
just so you know. that even if you disable it, it will still be charging. just not as fast bro. even with that little X picture on the battery it still is receiving a charge no matter what you think. Its not a bad thing to charge here and there anyways. its doesnt harm you battery at all. its good for it.
(I thought I asked this recently but can't find the post)
OK ... first off GPS / Nav works.
The issue is first off in car use cigarette plug charger, when as a phone only (or playing music via BT) all OK .. battery keeps topped up.
However if I use SatNav the battery cannot keep up .... even though it says charging it slowly discharges ..
I read here some car adapters don't give out full mA current, (that SGS can take) to be 100% sure, I went and bought a 1.5A USB adapter and still the same ... no problem until I switch on SatNav ... then it starts draining ... a couple of % every 15min.
I assume this is simply down to screen taking so much current .... but in very simple terms the phone should be able to keep up via charge when SatNav is enabled.
Anybody got a fix for this ? (screen dimming is enabled)
Ok seems that I am not the only one that is seeing this.
I've owned the S2 for a week and it feels very weird coming from HTC products.
It charges sloooooooow. Also I noticed that battery monitor shows weird values were on the Desire HD it was giving rock solid logical numbers in aspect of Voltage and current.
The s2 sometimes gives me 80% at 3,952 Volts and after a 40min drive 78% and ... 4,012 Volts. It is not stable at all
Just checking the stats in the batt monitor tool.
23:21 at 70% and 3,986 Volts while at 9:00 at 82% and 3,981 Volts.
It doesn't make any sense at all to me
From what I have read is that the charging controller of the S2 is only capable to charge up to a rate of 650mA while the HTC charged at 1000mA (0,65A vs 1A).
Now today I switched off wifi while driving and then it seemed to be very slowly charging. Give that a try and let us know.
Different types of chargers charge at different rates. Mains charges at 650mA, but USB and misc are around 450/550mA. If you're rooted you can change the charging currents in ExTweaks/Voltage Control/setCPU/whatever, however USB is limited as to what it can output anyway, and if you try and force too high a current through, things start to fry.
Sent from my GT-I9100 using XDA
You would not use a Mains charger when using SatNa
It would be a basic requirement that SatNav use in car would be able to keep charged with a USB charger.?
As the same micro USB port is used, how does, phone know its not on Mains?
In answer to above Q ..Wifi is off, I always turn it off when I enable BT.
Sargan said:
You would not use a Mains charger when using SatNa
It would be a basic requirement that SatNav use in car would be able to keep charged with a USB charger.?
As the same micro USB port is used, how does, phone know its not on Mains?
In answer to above Q ..Wifi is off, I always turn it off when I enable BT.
Click to expand...
Click to collapse
OK, that is an 'easy' one. The chargers 'shorten' the 2 data lines.
I've placed shorten between brackets because it doesn't do any harm at all.
I've you install battery monitor you can actually see 'usb connected' or 'ac charging'
As always using waze on my trip to work which takes about 50min.
Started at 58% and went up to 65% when I arrived.
lukesan said:
OK, that is an 'easy' one. The chargers 'shorten' the 2 data lines.
I've placed shorten between brackets because it doesn't do any harm at all.
I've you install battery monitor you can actually see 'usb connected' or 'ac charging'
As always using waze on my trip to work which takes about 50min.
Started at 58% and went up to 65% when I arrived.
Click to expand...
Click to collapse
Here is a simple Q then (maybe I'm naive) .. I am not using USB data port to charge, but a car USB charger point (no chance of any data)
Would charger manufacturers not have this 'short; in place as they are making chargers only ?
If not can you provide any details how to do this ... chargers have plenty of current, be good to get phone to use what it can of this.
dont know how to fix your issue but just to let you know its normal for the phone. Im always on my sat nav with a car charger and never been issues with losing any power. Quite often it comes off charge with more than it was plugged in with.
Hmmm.... I'm using original Blackberry car charger for both BB 9700 and SGS 2.
Yes, it charges slow, but with BT and GPS on it does gain on charge/percentage.
Sargan said:
Here is a simple Q then (maybe I'm naive) .. I am not using USB data port to charge, but a car USB charger point (no chance of any data)
Would charger manufacturers not have this 'short; in place as they are making chargers only ?
Click to expand...
Click to collapse
They should have but unfortunately they often seem to 'forget' it
If not can you provide any details how to do this ... chargers have plenty of current, be good to get phone to use what it can of this.
Click to expand...
Click to collapse
I have attached two photos showing an adapter I fixed myself. Look at the image 'charger-bottom-side.jpg' and notice the red circle. Within this circle you can see the short between the two data lines (D+ and D-). The short is simply a drop of tin-solder.
Sargan said:
Here is a simple Q then (maybe I'm naive) .. I am not using USB data port to charge, but a car USB charger point (no chance of any data)
Would charger manufacturers not have this 'short; in place as they are making chargers only ?
If not can you provide any details how to do this ... chargers have plenty of current, be good to get phone to use what it can of this.
Click to expand...
Click to collapse
As I said in my post. Install battery monitor and see if it says 'usb charging' or ac charging
lukesan said:
As I said in my post. Install battery monitor and see if it says 'usb charging' or ac charging
Click to expand...
Click to collapse
Which app is this (devleoper name ?)... and I'll get it ... just looked on market ... and there are 5 apps with this name.
Sargan said:
Which app is this (devleoper name ?)... and I'll get it ... just looked on market ... and there are 5 apps with this name.
Click to expand...
Click to collapse
3C
Sargan said:
Which app is this (devleoper name ?)... and I'll get it ... just looked on market ... and there are 5 apps with this name.
Click to expand...
Click to collapse
I have now purchased a new lead and charger (to be sure)
Running the App it shows "Charging AC Plugged"
It cannot keep up with current demand when Bluetooth & GPS active ... slowly discharges.
I have had the S2 for about a month now.
Seems like Sygic is the only GPS soft which I tried that doesn't hit the cpu 100% all the time.
I did a test over the weekend and with everything 'on' it slowly charged the phone.
yes
yeah, battery monitor will let you know that.
also suffered from this in the past
I have had the discharge problem using sat nav (Copilot live premium) and a car charger (various car chargers actually). Stock S2 with generic UK firmware. The problem exists on 4.03 and 4.04 - not sure about previous GB as updated to ICS as soon as I bought the phone.
I have found that if I apply battery save mode and turn down the screen brightness the charge just about holds station.
But the strangest thing I have found, although reading around I have not seen it mentioned elsewhere, is that if I enable mobile data the phone charges just fine whilst using sat nav. The problem only arises when I disable the data connection. This came to my attention whilst abroad where I deactivated data to avoid preposterous roaming charges.
This rather implies to me that something is trying to use the mobile data connection when it is deactivated and is causing battery drain when it can't. This could be any app of course, but the problem only rears its head when I use the sat nav (power hungry) with the mobile data turned off.
Has anyone else noticed this? Any advice on narrowing down which app/process this might be would be welcome.
Sargan said:
I have now purchased a new lead and charger (to be sure)
Running the App it shows "Charging AC Plugged"
It cannot keep up with current demand when Bluetooth & GPS active ... slowly discharges.
Click to expand...
Click to collapse
Sorry for bumping into this thread but I think I can help.
Correct me if I'm wrong, but I think your question is:
-Battery charging cannot keep up with discharging rate while using GPS and Bluetooth.
Reason for this problem:
-This occurs because usb charging further is lower than charging via wall charger, hence the battery heroes discharging when the demand is higher than the charging rate.
Solution:
-we need to increase usb charging current to equals the Ac charging current
How is that possible:
1.Root access is needed. If you don't already have root access key me know
2.custom kernel needed.
-You need to flash one of, Siyah, Dorimanx or dream kernel.
-Any of these kernels has the option to increase usb charging current
-move to 3. If you are already running any of the listed kernels.
3.after flashing the custom kernel, install extweaks from market.
-open extweaks
-under "misc", change the charging current to option 3.
Done
lukesan said:
I have had the S2 for about a month now.
Seems like Sygic is the only GPS soft which I tried that doesn't hit the cpu 100% all the time.
I did a test over the weekend and with everything 'on' it slowly charged the phone.
Click to expand...
Click to collapse
Swyped from my Samsung Galaxy SII
Jokesy said:
Reason for this problem:
-This occurs because usb charging further is lower than charging via wall charger, hence the battery heroes discharging when the demand is higher than the charging rate.
Click to expand...
Click to collapse
Wrong. Just read your own quote from Sargan's post:
Sargan said:
Running the App it shows "Charging AC Plugged"
Click to expand...
Click to collapse
Jokesy said:
Solution:
-we need to increase usb charging current to equals the Ac charging current
How is that possible:
1.Root access is needed. If you don't already have root access key me know
2.custom kernel needed.
-You need to flash one of, Siyah, Dorimanx or dream kernel.
-Any of these kernels has the option to increase usb charging current
-move to 3. If you are already running any of the listed kernels.
3.after flashing the custom kernel, install extweaks from market.
-open extweaks
-under "misc", change the charging current to option 3.
Done
Click to expand...
Click to collapse
I advise not to do that because:
It will not solve this problem as charging from AC is already detected by the device (see above).
The option is dangerous and will enable (if working at all) charging with the higher current limits from any USB port.
good to know
Jokesy said:
Sorry for bumping into this thread but I think I can help.
Correct me if I'm wrong, but I think your question is:
-Battery charging cannot keep up with discharging rate while using GPS and Bluetooth.
Click to expand...
Click to collapse
Actually in my case when using sat nav it will charge with mobile data enabled, but will discharge (whilst connected to the car charger/wall charger) without data enabled.
Is anyone else having charging issues? I'm having legitimate charging issues to the point where I've only been able to get a full charge once. The full charge may have been prior to root (I'll have to experiment more) but let's face it... This is a nexus. The majority of users are rooters and I haven't seen anyone else with this issue.
To preemptively answer a couple of questions; yes I am charging with the stock cable (and actually also a nexus charge cable from the play store which has slightly better amperage) and yes I am charging via an outlet (ac) as opposed to USB charging.
Also of significance, I am even powering the tablet down as to eliminate the possibility of a rogue process or wake lock consuming more battery than I'm providing. I'll literally plug the tab in at bedtime and wake up to see it at 27% where it was when I plugged it in.
I always confirm that it's charging either via the charge animation while powered off or the battery stats screen while powered on..
Somehow while I was using it, I managed to get it charged to about 57% and powered down and plugged in for the night. It was sadly in the same place in the am. We're talking 8-12 hours of confirmed charging and no gain.
So did I just get a faulty device? I'd blame it on the charger but I've tried two with the same results. I'm considering getting a replacement to see if I have different results. I worry I'll see the same thing.
Sounds like you may have a defective device. You've tried everything I'd recommend. I have the device and don't have your problem. So I don't think you'd have the same problem with a need device. There is a thread here were others have had charging difficulties
http://forum.xda-developers.com/showthread.php?p=56807546
Sent from my Nexus 9 using XDA Free mobile app