Don’t forget to add the app to the “do not optimize list” to prevent it from being killed.Īs you complete a few charging cycles, the app will start showing an estimate of your current battery capacity in the ‘Health’ tab. Just taking it off power, with the screen on, seeing that it has not reset, and then turning off the screen for 5 seconds and turning it back on has led to it resetting multiple times.All you need to do is install AccuBattery from Play Store, set up the app, make sure the shown battery design capacity is correct, and leave it for a few days. The battery guage will apparently reset even before 5 days has been reached, as early as 4 days, 9 hours. It is possible to prevent a reset for at least 8 days if all the conditions are right, as shown below: When I get more data points I will update this answer. Ironically, putting the phone in battery saver may make this more likely! I am still trying to determine the exact sequence of steps to prevent this, but it is slow because it takes at least 5 days until I can try the next experiment. The graph may also reset itself spontaneously while not being charged if the battery graph app gets killed. One the "days ago" value reaches 5, the graph may reset any time you take it off the charger, no matter what the charge state is. but a few days later I notice it went from 4 days to 5 around 10p.m. For instance, I once had the graph reset at 9:47a.m. Once it is reading more than a day, it does not seem to actually switch days based on when the graph reset, but from a fixed time in the day. Under the chart there is text indicating how long it has been since the graph was reset. I very rarely let the battery charge go above 80%, but this does not prevent a reset. Typically the graph will reset as soon as the battery is removed, but it may reset before this if the charge reaches full. If the battery charge reaches 90%, the graph will reset. Preventing the battery graph from resetting has become somewhat of a game for me - a game that I lose if the graph resets. I have been trying to find the answer to this question for quite a while. If you install GSam battery monitor, you get more meaningful interpretation In outlet words, 60*30 =18% of battery capacity is used by YouTube. In app usage of it shows YouTube used 60%, it means 60 % of the drop (=30%) is used by it. Suppose you charged fully (100%) and used only YouTube and Chrome till it dropped to 70%. Without specifying the Android version and an accompanying screenshot your question about interpretation cannot be answered fully, but here's an example. Location of batterystats.bin file is /data/system/batterystats.binīattery usage statistics in Android is poor though it has improved considerably in Oreo. Relatively full is not defined AFAIK but from experience 90% charge does the trick of resetting it. it is reset every time you unplug from power with a relatively full charge (thus why the battery usage UI data resets at that point). Quoting from an old post by a Google engineer "What is it precisely that resets the battery stats?" Here's an example of when it reset at about 75%. So, I guess what I'm asking is, "What is it precisely that resets the battery stats?"Īndroid is open source? Does this mean the code is readily available to look through? Where would I get started to try to figure it out myself? Is this kept in a battery library? Where's the source code for that? Time charging (it also seems to happen if it's a short or a long charge) Not letting the battery get empty (it seems to reset the stats more when the battery is low,ģ. (thought it would be this simple a couple of months ago when I started this investigation, but it's not this simple)Ģ. There's a label between the two sections that says "Use since last full charge"Īnd I can't figure out what constitutes "full charge".ġ. Which apps have used the most battery power over (what appears to be) that same period.a graph that shows how full the battery has been over some period.I'm looking at the "Battery" section under "Settings", and there's two major sections:
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