Hot answers tagged

15

Of course your device requires power to run – whether you've set it for charging or not. Question is: Does it use more power than it gets by charging? Which depends on multiple factors: Your "power source". USB only charges with 500 mA (USB2) resp. 900 mA (USB3), A/C with up to 2 A. Your devices power consumption. Depending on what it's doing. Display ...


9

Tests done to arrive at the answer posted below were correct but the interpretation of results was erroneous on my part. This was validated by two sources including Battery University and based on the correct interpretation and additional inputs a separate answer has been posted. This also helps in readability and understanding Power is consumed by the ...


8

No Calibration of batteries (Li Ion or Li Po, used in almost all mobile devices) is a myth You can start using it straight away and charge as you normally did with earlier batteries This post will help you understand more: Looking for a consistent answer about battery calibration Using calibration apps doesn't really help as the battery files in system ...


6

This is indicative of poorly designed/ defective piece and best replaced ASAP. From bwDraco's answer on Why do some AC adapters and power supplies generate a whining noise, and what can I do about it? (emphasis added; missing text denoted by "....") Most modern AC adapters are switched-mode power supplies. The internal switching frequency of an SMPS is ...


5

Yes. Phone does use power from battery when recharging. Although thats something which would more likely depend on how phone is designed, so it may not always be true... but most phones are this way. I am basing my answer on a test I did. I reduced the charging voltage while at the same time making my phone (my old Samsung Galaxy S3 I9300) use high battery ...


5

You don't need a calibration app for that. Just fully charge the battery to 100% (in one run), let it run down to below the 20% mark, the recharge it to 100% (again in one run without interception) – battery calibrated. And as that describes a "normal day" with recent devices (take it from the charger at 100% in the morning, put it back almost depleted in ...


4

The OS isn't relevant to charging speed, but the internal hardware differs heavily between phones. One thing you'll experience is that nearly all chargers that advertise themselves as 2.1A are optimized for iProducts, which require a different grounding scheme in the charger to reach their full speed, and that same scheme limits Android devices to 500mA. So ...


3

As already mentioned, Power Tutor doesn’t display power for the GPU. Power Tutor is a very cool app, but it's based on research that was done in 2011. It uses modelling to estimate power consumption. No actual power is displayed. Power Tutor is surprisingly accurate when it is run on the phone that was used to create the model, but that phone (the HTC Dream) ...


3

The power consumption isn't noticeable. Even a tiny watch battery can run a small LED for a few days continuously. Increasing the blink rate won't change the power consumption at all: what makes a difference is how long the "on" part of the blink is compared to the "off" part. This is called the duty cycle of the LED. Most LED controllers use the duty ...


3

I am answering my own question, because i somehow solved it. I downloaded the Battery Doctor app (the one featured by Clean Master) and created a scheduled profile for night that has timeout set to 5. Also enabled 'charging screensaver'. It's ok now. Battery doctor takes over the TouchWiz uselsss popups and notifications, and forces it to stand by after 5 ...


2

I've found a solution for the following problem: -The Nexus 7 2013 device must never be turned off unless it has an insufficient amount of battery -When the Nexus 7 2013 device is exposed to an inductive charge, it should turn on automatically In order to apply this change to my device, I activated the bootloader and ran a simple batch file with the ...


2

Answering own question in case anybody else has the same issue. There is another file /system/usr/keylayout/Generic.kl that contained the mapping for the power button. The Android docs say never to modify this file but I did anyway. Commenting out the power button line in this file has solved my issue (power button stuck in) and I'm now using my volume up ...


2

If its downloading 1 file from 1 site - barely works: Its offloaded to modem. If its downloading via torrent - Might work harder; decrypting, hashing, etc... Basically Downloading takes little CPU -----> I am gonna guess youre asking "Why does downloading eat my battery so hard?" If that is the case: Then Think of your Cell(3g,4g,etc) and Wifi As giant ...


2

I had the same problem and today I did find what was causing my problem. It just started yesterday, 2 weeks after I got the phone. And the ONLY thing that was different is that I started using a generic AC charger that arrived yesterday. When I suspected it was the charger this morning, I switched back to the white Samsung charger that came with the phone ...


2

There is more to an adapter than just the current, although kudos to you for knowing that much. The problems arise due to the fact that the USB-2 spec is for a maximum of .5 A at 5 V without some extra handshaking to ascertain that the device wants and can handle more. For Apple devices, this is done in a certain way according to their "standard", which is ...


2

This is to point out a possibility of replacing echo option, with a copy paste option ( Before that, here is a similar search Prevent complete charging?. .) Related efforts and success for AC charging by replacing the file itself, when echo was not possible, (for reasons I still don't know) is my answer for Honor 6 phone here How do I override charging ...


2

Short Answer Is the power consumed from charger or battery to power the device when charging?"- Power is consumed from the charger. "I want to know if my battery will take a hit [while downloading torrents]"- No Long and Technical Answer In continuation with my earlier answer quoting Battery University BU-409 Charging Lithium-ion Noticed that there ...


1

There are free apps in Google Play like Trepn that show you exactly what happens to the CPU frequencies of all cores during a file download. This data is captured in the background so the screen can be off. They also show the CPU load and actual power consumption in mA or mW. I've found that downloading a large file over Wi-Fi uses more power than you would ...


1

Technically, if your device is connected to a charger, it may be possible if your phone is rooted. You can edit the program which shows the charging animation when your phone is powered off (typically stored in playlpm or lpm in /system/bin). You could replace it with a simple shell script to reboot the phone when the time is equal to some value, ...


1

Just go full stock with a factory flash. See if the problem is present then. If it is, it is a hardware issue, and you can claim warranty. If it works, be a lot more careful with your apps next time.


1

Provided you have adb access as root while in recovery, you can adb pull the *.rc files from recovery's ramdisk and search the entry or similar to on charger to see what the equivalent service is. Or ,again, while in adb shell in recovery, cat /init.rc which is where the entry for charger/on charger functions should be. The battery animation resources ...


1

I just had this problem too. The solution without having to download any outside apps is to go to "developer options" then uncheck "stay awake while charging" Not sure why they would have this as a default setting...


1

If you have got root acces then install an app from the play store that can shut down your phone. Like this one: https://play.google.com/store/apps/details?id=GRuV.PowerOff.PowerOff Hope it helps!


1

For a quick fix for it rebooting after you power off, try holding the volume-up button while holding the power button. For the phone, it simulates a battery pull. Maybe try to wait overnight and wait until the morning to see if the problem still persists. If it does, hold the volume-down button and the power button at the same time, from the shutdown state ...


1

To check the amount of current (in mah) received by the mobile use app called - CurrentWidget Only High Quality Cables will give you high current from Adaptor, for example when your adaptor has max output of 2A and using high quality usb 2.0, you will get around 1900mA which is almost equal to Battey Output. Onother hand, when the cable is bent (due to ...


1

This is a known issue with Lollipop, please see the following: Issue 79445: No silent mode


1

I had the same problem on Alcatel POP C5 with Kingstone 8GB micro sd class 10 card. First i thought that the problem was with the phone. Then after replacing whit another, borrowed card, the phone was working normal again, so i concluded that it was the bad sd card. Using Wake Lock - PowerManager with PARTIAL_WAKE_LOCK enabled did solve the problem, ...


1

The solution is to install program Wake Lock and set the setting to PARTIAL_WAKE_LOCK. This keep necessary power for SD card even if of charger and with disabled display. It obviously cause a bit more battery consumption, but far less then constant SD card remounting. No root needed.



Only top voted, non community-wiki answers of a minimum length are eligible