I noticed a variation between the stock battery display and 3rd party battery apps (2x battery in my case)
Stock will say 100 were 2x's shows 95-99 as soon as I unplug.
this 1% on the 2x app is probably normal, but stock only reads by 5's so it stays at 100 until it gets to 95...
It keeps charging until 100 via stock but I also charge overnight with screen off
Edit: yeah what he said...
----posted maxx'ed out----
My stock battery meter only shows in 10% increments, whereas the others are in 1% increments. When I charge my phone while it is on it will charge until it is at 95% and report that it is fully charged. I can unplug it then plug it back in or use it and it will then continue to charge to 100%. Of course the stock battery meter shows it as 100% charge bc it only does 10% increments. You would only know that it is charging to 95% if you are using another battery meter that tracks in 1% increments
I wonder if anyone else who is using a 1% battery meter has the same experience with their Razr. And I wonder if the reason it does stop charging at 95% is bc, as FoxKat said, it is not healthy for the battery to fully charge. Given that, I will leave well enuf alone and unplug at 95%.
I have done the full charge cycles while the phone is off and I think it does the same thing...stops charging at 95% but I don't remember for certain. I will do that with the phone off tonight to see if it does only charge to 95% or to 100%.
Sent from my DROID RAZR MAXX using DroidForums
Well, I can see we've totally hijacked this thread. Fortunately for the OP, his original questions were answered, so I will proceed, but let's wrap this up here and now, and if there are additional questions, jump into another thread for batteries to bring the discussion around, or better yet, use the search as I and others have addressed all these questions in one manner or another so many times before.
These meters show only 10% increments for a couple very good reasons. First, if they show you 1% increments, and you are watching them like a Hawk (as so many of you are), you're going to be disappointed when the rate of discharge seems to go very fast between full charge and let's say 80%, and then again between 30% and let's say 10% (as so many of you are). It's the nature of these batteries that they "appear" to discharge at different rates when in different ranges of the voltages, however it's simply a characteristic of the voltage drop-off slopes which are used to indicate the The State of Charge (SOC), that cause it to appear that way. The battery will discharge at whatever rate the phone is pulling the current. If current is being pulled quickly, the battery will discharge quickly, and vice versa.
Second, when it is saying 100% after a FULL Power Off Charge, the battery DOES have 100% of its capacity filled, however the moment you disconnect and turn it on it will start to deplete. After using about 10% of its stored power, the meter will drop to 90% and so on, so until it's used up what it believes is 10% of the full charge, it will continue to show 100%. This is obviously not accurate, but could you imagine the complaints if right after removing it, the meter said 90%? Just look at the concerns you have now with it showing 95% on the third party battery apps, and you get my point.
Furthermore if it is showing 100% after a full charge with Power On, it may not be AT 100%, but somewhere between what it thought was 100% and what it thinks is 90%, and like above will still show 100% until it reaches what it thinks is 90%, at which point it if left on the charger will begin the topping off charging phase again to boost back to what it thinks is 100%. This is all gray area at this point since it may ACTUALLY be at 85% when it "thinks" it's at 100%, so when it "thinks" it's at 90%, it may ACTUALLY be at 75%!
Third, they really don't want you to think the meter is that accurate for a really good reason...it isn't. So many factors play into determining the SOC that even the best equipment, costing several thousands of dollars are still not 100% accurate at determining SOC for a battery and from one testing manufacturer's equipment reading to another there may be as much as 10% or greater variance. There are now even highly advanced battery testing devices which read the battery's magnetic field (almost like an MRI or X-Ray conceptually) to get a different, perhaps a "truer" representation of exactly how much the battery has stored. So what are we to do? How about STOP WATCHING THE METER!
The SOC will be what it says it is when the charging is done with Power off. Screen Off and Power Off are not be confused.
With Screen Off, the phone is in a reduced operating state, which obviously uses no power for the screen, and also may reduce other background functions, reduce the CPU clock rate, and even turn off certain services as it finds no need for them. Still, it can go the other direction while on charge, such as if the phone rings, if it has apps/widgets/services running that call for things like webpage, social networking, location or weather updates, utilizing the Cellular, 3G &/or 4G radios, GPS, Bluetooth, etc.
It's these sudden and larger current draws that throw the monkey wrench into the charging and metering process and cause everything from incomplete charging being pegged as 100%, to overcharging, to the eventuall divergence of the battery "meter" to the actual battery "levels" or SOC, or in other words the meter telling you that you have 30% left, and 10 minutes later you're getting the "Low Battery" indicator at 15%, or that you have 100% charge immediately after pulling off charge (when you really only have 70% to 85%), and yet the phone seems to drop quickly in the first hour or two of use in a relatively short timeframe. Truth is it might have only consumed 10% - 15% but with the error regarding full it appears to have consumed upwards of 40%.
With Power Off, there is nothing to pull power running, nothing to confuse the charging/metering circuits, and the result is an unfettered charging process that continues at the full charging rate until the trigger point where it indicates the "saturation stage" begins, and then continues until the battery reaches its true 100% of capacity. In other words, 100% is only 100% of what it is believes is 100%. If charged with Power Off, it has the best chance of determining the true capacity and the actual point in charge it is, so that it can switch to the saturation stage accurately, continue and reach what it is able to determine is 100% of capacity and shut off.
See
Charging Lithium-Ion Batteries for an in-depth (more than my in-depth) explanation and some great information.
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