Hot answers tagged

16

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 ...


14

It's a scam. Android app cannot access physical battery directly. The battery file is just an interface for Android with value provided by the battery's sensor. Again, a sensor only reads data; it cannot write/modify anything. An article on Android Police explained this very well, Battery not working correctly? Well, just defrag it! It's all so obvious ...


10

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 ...


9

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 (...


8

Set up adb in a PC, connect the device to the PC, launch a shell on the PC and enter: adb shell "dumpsys package | grep -A1 'userId=UID'" Replace UID with the ID you're looking for, such as 10102. Example: bash-4.2# adb shell "dumpsys package | grep -A1 'userId=10102'" userId=10102 pkg=Package{46171ce com.android.chrome} bash-4.2# The line ...


8

Motorola Droid 4 XT894 has 1785mAh battery with 2% tolerance i.e 1735mAh actual battery capacity. Your seller seems to have fooled you. Also it doesn't seem like the seller put up the battery description as 3300mAh by mistake as he has put this in Title name itself You could have taken out the battery from phone and flipped it to see the battery capacity ...


7

Firstly one needs to understand C-rate or charge rate. Quoting from the linked article C-rate is a measure that governs at what current a battery is charged and discharged. At 1C, a battery rated 1,000mAh charges at a current of 1,000mAh. In an ideal world the battery would be fully charged in 60 minutes. At 1C, the same battery discharges at 1,000mA. ...


6

There is a known issue on Nexus 5/6 with Marshmallow and wifi. This wifi drain has been noted by many users, me included. http://forum.xda-developers.com/google-nexus-5/help/wifi-plaguing-android-marshmallow-t3220031


6

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 ...


6

Good question and to give a definitive reply is not possible since OEMs use different battery charging algorithms both at hardware level and OS level. Details of these are deemed "proprietary" and not available on public domain. By way of providing the background to understand: Battery Charging circuits have a dedicated "Power Management IC (PMIC) to take ...


6

Prowler answers your first question well: "Why does this happen" -> Prevents data corruption. To answer your question "How can this behavior be overridden?" You can try: setprop status.battery.level 50 from a shell terminal. Note that bypassing the shutdown is 10x more risky than a battery pull. However, in a true emergency, benefit > risk. Why it's ...


6

Li Ion battery discharge is not strictly linear, (unlike a capacitor ). This ensures available power is utilised till the end of battery charge But it is fairly linear, more so at lower loads as can be seen from this figure, where C-rate or charge rate is the discharge/ charge rate Assuming your app is not a heavy power hog, it is reasonable to ...


5

Fast Charging can be achieved in two ways Hardware based Charging Qualcomm- Qualcomm Quick Charge 2.0 and Qualcomm quick Charge 3.0. Also see Fast Charging by Qualcomm 3.0- impact on battery?. This is the most popular, adopted by OEMs under various brand names Type C USB Charging- USB Type C Charging explained. Also see Android phone “charging slowly”: ...


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

Battery contains the chip which provides information to fuel gauge hardware and drivers. Since you have already done that, next is to determine if the problem is with fuel gauge drivers/ software or hardware. Wipe clean your phone (cache, dalvik and system) and flash stock ROM for your phone. Don't install apps. Switch to safe mode, charge for about three ...


4

Note: Following solution: is tested on Android 4.2.1, COS12 (Android 5.0.2) and CM12.1 (Android 5.1.1) - all of them running Play Store v6.0.51 requires a rooted Android here is a short demo of the solution While browsing the manifest of Play Store, I took an educated guess that only the following service is likely the initiator of auto-update of ...


4

I can say %99,9 of all apps that claim to fix battery, get you longer battery life, better CPU usage, better RAM management, are completely useless wastes of battery, CPU and RAM usage. That app is no different.


3

Talking about LG, it's likely this is not any kind of NFC. I have an LG phone with 4-pin port on the phone and 4-pin battery. When I cover the 4th pin with some masking tape, the phone complains the battery is not genuine and refuses to boot picture. A quick poke with a logic analyzer has shown me that there's a communication between phone and battery of ...


3

A few days back I had the same problem and I was able to fix it! Now all you need to do is go to Settings → Location → options (3 Dots top right corner) → Scanning → Uncheck Wi-Fi Scanning. This is for Marshmallow update.


3

Okay, to address the points here: 1) Marshmallow doesn't have the option of "Scanning Always Available" as it was in Lollipop. So, what to do? 2) Marshmallow still has these options, only now they are fragmented and redistributed. It is now under: Settings->Google->Services>Location>3-dot menu->Scanning->Wi-Fi scanning Also, there are: Settings->Wi-Fi>...


3

Proper explanation is fairly technical, so am answering in broad terms (you can skip the links if you don't want to get into nitty gritty) Charging rate is a measure that governs at what current a battery is charged and discharged. At 1C, a battery rated 1,000mAh charges at a current of 1,000mAh. In an ideal world the battery would be fully charged in 60 ...


3

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 ...


3

I would start by holding all three physical buttons for a full 3 minutes (phone switched off) to fix battery logic problem. This resets the battery logic on some phones and how the battery talks to the software to let it know how much power it has and other parameters. Service center may be able to help you with exact procedure for your phone (please share ...


3

First of all, I would like to thank everyone who helped me understanding what can be the problem exactly; I am posting it as an answer because this is what solved my issue. The problem was neither with the charger nor with the USB cable. The real culprit was an extension cord which was offering very high resistance probably. Since my socket is at a ...


3

Quoting from Bluetooth documentation at Android Developers, it appears that this capability is based on connected device profile. Android supports this functionality from API level 18 (4.3). How to get Bluetooth Headset battery status in android from Stack Overflow indicate similarly, with vendor specific implementation links Generic Attribute Profile (...


3

Short Answer From battery health point of view, Qualcomm Quick Charge 3.0 is comparatively better than Qualcomm Quick Charge 2.0, since power used for charging is better controlled, resulting in lesser heat Quick review of concepts (optional read) Essential concepts are summarised here in bullet form. Some of these have been elaborated in How does ...


3

Li Ion or Li Po batteries don't die suddenly - their performance degrades in terms of : a) Short Term: Ability to hold charge and deliver expected performance b) Long Term:: Deliver upto 80% capacity upon being charged / discharged over a period of time (in other words life of battery). The battery is considered to be technically dead if it delivers less ...


2

The issue is to not let the battery specifically lithium battery be full changed and not let it completely discharge . let it be between 40 to 80 percent. by using USB is more suitable because it let the battery to be slowly charged with significant absence of heat to damage the battery. Thanks


2

This issue is widely reported and discussed on Google support forums. I experienced exactly the same thing on my Nexus 5 when running any CPU/GPU intensive apps. In my case running SkyForce game immediately caused the phone to shut down with 100% repeatability. Most of the time after the restart the phone would report significantly reduced battery charge ...


2

Yes, leaving a lithium ion battery fully discharged for long periods can destroy the cell's ability to hold a charge. If you are going to be storing batteries for a long time, leave them about half charged.



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