Android inaccurate battery reading

When you say "allow the battery to discharge", I. Also, what is the best charger to use for my phone, and how much would it cost to replace the battery? Thank you. You can use the phone any way you want, just don't charge it in between. Charger and cost would be different for different devices, so ask someone who has your device.

After that, the next charge must be with the phone on or off? Just to be clear, I'm talking about step 9. XDA Developers was founded by developers, for developers. It is now a valuable resource for people who want to make the most of their mobile devices, from customizing the look and feel to adding new functionality. Are you a developer? Terms of Service. Hosted by Leaseweb. Thread Search. What do you think of the new Apple iPhone SE? April 16, OnePlus 8 and 8 Pro announced — Everything you need to know!

April 14, Image Warp helps you transform pictures with manually adjustable grids April 14, Thanks Meter : 1, OP Senior Member. Join Date: Joined: Nov Junior Member. Thanks Meter : 0.Joinsubscribers and get a daily digest of news, geek trivia, and our feature articles. Laptops, tablets, and phones never seem to know exactly how many hours of power they have left. The estimate may jump from two hours to five hours before dropping back down to one hour.

All your laptop can do is monitor how fast its battery has been draining over the last several minutes and make an informed guess. Crank the display brightness to maximum and launch a demanding PC game, though, and the estimate might become two hours.

If you see a low estimate, you can make your battery last longer by easing up on it. This estimate can also fluctuate based on the work your computer is doing in the background. In other words, your device makes an estimate based on the current rate of battery drain. Batteries suffer wear and tear as you use them. This causes them to decrease in health. Some devices are better at understanding how much power they have. The current full charge capacity will be lower than the original design capacity due to the battery deteriorating.

Battery life estimates will never be completely accurate, but the percentage figure is more accurate than the time estimate. The Best Tech Newsletter Anywhere. Joinsubscribers and get a daily digest of news, comics, trivia, reviews, and more. Windows Mac iPhone Android. Smarthome Office Security Linux. The Best Tech Newsletter Anywhere Joinsubscribers and get a daily digest of news, geek trivia, and our feature articles.

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Want to know more?Battery problems are among the most common smartphone concerns, which is why we offer so many useful tips for solving battery drain issues. If you notice that your battery performance and duration has decreased, it could be time to calibrate it. You can find more videos on current tech topics on our video page.

Look for bulges or leaks. In the image below, you'll see what a normal battery looks like next to a swollen one. If your phone doesn't sit flat on the table anymore, that could also be a sign of a swollen battery. If you're satisfied that the battery itself is not the problem, you can move on to the steps below.

If you think your battery might be the problem even after trying to recalibrate itwe'd advise you to take it to a repair shop for an expert's opinion. Buying a cheap knock-off battery only leads to more headaches in the long run. Keep in mind that there are plenty of other things that can cause a battery to malfunction. If you've just updated the firmware on your phone, battery drain is a common complaint, so you might want to clear the cache partition on your device.

Thankfully, we have plenty of guides on how to clear the cache on various devices. The Android operating system has a feature called Battery Stats, which keeps track of battery capacity, when it is full or empty.

Calibrating your Android battery simply means getting the Android OS to correct this information so it is reflective of your actual battery levels once again.

It's important to understand that you can't actually calibrate the battery itself: it is, after all, just a cell that stores power and discharges. However, lithium-ion batteries do include a printed circuit board PCBwhich serves as a protection switch to stop them exploding or deep discharging. Lithium-ion batteries don't have a memory so there's not much you need to do to keep them running as they should.

The problem lies with how the Android system reads and displays the current capacity of the battery, not the battery itself. The same goes for the myth that deleting the batterystats. That file on most devices anyway simply stores data about what is using the battery when it is not being charged.

It is also reset every time a battery is charged to over 80 percent and then disconnected from the charger. The batterystats.

The old 'fully charge and discharge' approach stands as one of the simplest ways to 'recalibrate' your Android battery. We've warned you in the past about low voltage problems in lithium batteries and the negative impacts of fully draining a battery on its lifespan and the same holds true here.Keep in touch and stay productive with Teams and Officeeven when you're working remotely.

Learn how to collaborate with Office Tech support scams are an industry-wide issue where scammers trick you into paying for unnecessary technical support services. You can help protect yourself from scammers by verifying that the contact is a Microsoft Agent or Microsoft Employee and that the phone number is an official Microsoft global customer service number.

Although it gives good battery timing which is 3. Like nowadays the problem is at its peak. I understand that the system is showing wrong information on the battery meter. We will assist you to resolve the issue. I suggest you to perform SFC scan and check if it helps.

Choose Command Prompt Admin. You must run the command prompt in Administrator level. If everything went okay and no errors were found, restart your computer and see if the issue re-occurs. Hope the information helps.

Let us know if you need further assistance. We will be happy to help. Did this solve your problem? Yes No. Sorry this didn't help. I have a similar issue. Also some times it says plugged in not charging when it is charging. I contacted Lenovo they say Microsoft needs to fix it. I have the latest BIOS. Faisal install the latest BIOS to see if it helps and Compatible avaliable updates from manufacturer website or windows update.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I am trying to collect power usage statistics for the Android G1 Phone. I am interested in knowing the values of Voltage and Current, and then able to collect statistics as reported in this PDF.

android inaccurate battery reading

But the problem is that Android does not expose the value of current through this SDK interface. One way I tried is via sysfs interface, where I can view the battery current value from adb shell, using the following command.

But that too works only if the phone is connected via USB interface. I am not sure why the value of current reported is zero. It should be more than zero, right? Also please correct me if I am wrong. You could just look at the source code for the Current Widget.

It has hard coded path's to where certain platforms store the current values. API 21 onwards we can get the instantaneous battery current in microamperes, as an integer. Developer docs. Android open source docs. Only way I found was to measure current flowing through battery by means of multimeter. This is true of the Galaxy S2 which have the chips measuring such current flow! But it's "deactivated" in the stock kernel.

android inaccurate battery reading

Meaning it's removed from the sysfs interface and used only internally by the battery. Nevertheless you can try the app Battery Monitor Widget from Market, it supports many phones and will estimate the mA current when not available. Support for new phones and methods are added on regular basis to improve the readings. The results is that that phone doesn't have a learning curve. Learn more.

Getting the battery current values for the Android Phone Ask Question. Asked 10 years, 1 month ago. Active 3 years, 8 months ago. Viewed 67k times. Chintan Parikh Chintan Parikh 1 1 gold badge 4 4 silver badges 14 14 bronze badges. You might want to watch the presentation for that on YouTube. I was there, and I seem to recall Mr. Sharkey mentioned something about having special hardware for those measurements. Here's some sample code that you could try. Thanks for the link, I am using similar function to read the Battery Voltage.

android inaccurate battery reading

But Android doesn't expose the value of current through that interface.You can also choose settings to help your battery last. To troubleshoot battery drain, use the steps below. Google Play services lets your phone use Google services. Learn about Google Play services. Important : Settings can vary by phone. For more info, contact your device manufacturer. Tip: You can see UninstallRemoveor both. If you're still having trouble, visit your carrier or manufacturer support site.

Google Help. Help Center Community Android. Privacy Policy Terms of Service Submit feedback. Send feedback on Help Center Community. Fix Android issues Battery issues Fix battery drain problems on Android. Important: Some of these steps work only on Android 9 and up. Learn how to check your Android version. Step 1: Restrict apps that use the most battery Important : Settings can vary by phone. Restrict apps with high background battery use Open your phone's Settings app.

Tap Battery. Open your phone's Settings app. To see or change how a listed app uses battery, tap it.

How to fix Android battery drain issues and extend battery life

Step 2: Force problem apps to stop Important : Settings can vary by phone. If needed, tap App info before the app. To see your options, start dragging the app. If you don't see "Uninstall," you can't uninstall the app.

Lift your finger. Restart your phone "reboot" Press your phone's power button. On the screen, tap Restart. Check for Android updates Important : Settings can vary by phone.

You'll see your update status. Follow any steps on the screen.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Android Enthusiasts Stack Exchange is a question and answer site for enthusiasts and power users of the Android operating system. It only takes a minute to sign up. The original Samsung battery is mAh. This is my second purchase from a different seller, after discovering that the 1st was a fraud.

In Android tools, the new battery capacities say mAh only as maximum capacity. I complained to the seller, and he suggests to do full charge cycles, re-calibration. However, that did not increase the capacity. The seller is trying to prove that calibration can increase the capacity of the battery he has sold me to mAh as advertised.

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However, this doesn't look like it's gonna happen. In Android, one can get the stock hard-coded battery capacity from battery profiles, an hidden API in Android. To know the path on your device, from 3C Toolbox, tap request support from Help and support menu.

This file amongst other things specifies the path of second source. When you change your battery and replace with an extended battery, the ROM information is not updated.

This change is for this app usage only. How to measure actual capacity using 3C Toolbox Your concern is on verifying the actual capacity which was mine too. This can be done by using the current sensor of your device. If your device doesn't have a current sensor, it derives from voltage sensor and may be less accurate. Here is the relevant portion of reply from the developer that should help you.

So in the end the only fully reliable way to verify capacity would be to pin the battery to an external meter.

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Less reliable is to use the current sensor when available and using my app you can get the actual capacity derived from actual measures of the sensor. For that the best is to use a 1 minute monitoring while charging, as sensors are often updated every minute using an average value for the past minute. Sensors often provide very accurate results. You will need to spend time in searching if it has a current sensor.

It is better to avoid that search, since we are looking at approximate capacity to determine if it is a fake. Hence, in 3C Toolbox settings, you could set. Edit: For more detailsplease see Where are the battery capacity files located. Sign up to join this community. The best answers are voted up and rise to the top. Home Questions Tags Users Unanswered. How to determine maximum capacity of a battery in mAh? Asked 5 years, 2 months ago.

Active 2 years ago.

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