Develop Bugs

[Q] How to calibrate new extended battery

Ive read that the way weve always used with the wiping of battery stats actually doesnt do anything.
I got a GTmax 3500 mah battery but the phone turns off at 0, even though it has power, its sitting at the recovery screen and is just fine. I was wondering, do i just leave it here to drain it, or do I have some other method of calibration. Im pretty sure its going by its old stats because it drained in 12 hours and turned off. I SHOULD get ~23-24 hours on the new battery.

Yes, it has been determined that the battery stats file we used to wipe does absolutely nothing to prolong the battery's charge on any Android phone. The only thing it does is wipe out the statistics that we see for what is using the battery. Personally, I've never noticed any difference in battery longevity when wiping the stats file, so I stopped wiping it long before this information came to light.
As for your issue, the phone turning off at 0% seems pretty normal to me. I'm not really sure what your concern is. Just because you can access the recovery screen doesn't mean there is enough power to let the phone run normally. I would let it charge for several hours before using it again or at least leave it on the AC charger while you use it. It is also not a good idea to let the phone discharge down to 0%, as this can shorten the lifespan of the battery. Typically, the battery power meter is pretty accurate. Plus the battery should be fully charged before use. It is speculated that if you condition the battery itself (fully charge, then fully discharge (the one and only time this should be done), and fully recharge it again), you may see better life. Considering that on a typical day, I get about 5 hours of heavy use before I have to plug it in, I would welcome 12 hours without having to charge.

DarkShim said:
Yes, it has been determined that the battery stats file we used to wipe does absolutely nothing to prolong the battery's charge on any Android phone. The only thing it does is wipe out the statistics that we see for what is using the battery. Personally, I've never noticed any difference in battery longevity when wiping the stats file, so I stopped wiping it long before this information came to light.
As for your issue, the phone turning off at 0% seems pretty normal to me. I'm not really sure what your concern is. Just because you can access the recovery screen doesn't mean there is enough power to let the phone run normally. I would let it charge for several hours before using it again or at least leave it on the AC charger while you use it. It is also not a good idea to let the phone discharge down to 0%, as this can shorten the lifespan of the battery. Typically, the battery power meter is pretty accurate. Plus the battery should be fully charged before use. It is speculated that if you condition the battery itself (fully charge, then fully discharge (the one and only time this should be done), and fully recharge it again), you may see better life. Considering that on a typical day, I get about 5 hours of heavy use before I have to plug it in, I would welcome 12 hours without having to charge.
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Thats strange. I got some friends with iPhone 4S and they get over a full day with some moderate use. I get 12-16 hours tops. I can easily drain it in 8 hours. Doesnt seem like it should require mid day charging.

Rekzer said:
Thats strange. I got some friends with iPhone 4S and they get over a full day with some moderate use. I get 12-16 hours tops. I can easily drain it in 8 hours. Doesnt seem like it should require mid day charging.
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Under volt, setcpu, good kernel, brightness etc.
Sent from my SGH-T989 using xda premium

Rekzer said:
Thats strange. I got some friends with iPhone 4S and they get over a full day with some moderate use. I get 12-16 hours tops. I can easily drain it in 8 hours. Doesnt seem like it should require mid day charging.
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It is very difficult at best to compare iDevices and Android devices. The hardware and software are completely different. Regardless, I also know folks with the iPhone 4s. About half of them drain their device within 5 hours. Constantly doing stuff... The batteries on most smartphones are just not up to standards with today's hardware. At any rate, the rest of the folks I know with the iPhone 4s are more moderate users. They get about 7-8 hours. One person claims she gets 9. It depends on usage. Plus, as avarize stated, underclock, a decent kernel, screen brightness, etc... And SetCPU is a great app (even for non-rooted devices). Also, constant text messages tend to drain devices. It just depends on how you use it.

[Q] Strange Drain Mugen Battery

I have a 3900 mAh battery from Mugen. Ive noticed the battery lasts about 30 hours. But I find something very strange. It drains around 96% in just 15 minutes on straight boot after charging every time. In fact, the first 80% of so drains pretty quickly? Ive had it in my phone for about 2 weeks. Has anyone else noticed this or know why this may be happening. Also when at 100%, and i inplug it, goes straight to 98!

Have you done a battery calibration? Get the Battery Calibration app from the play store.
There's some argument as to whether this does anything or not, but have you conditioned the battery? That means letting it drain completely, then charging it continuously till it hits 100% - do that several times.

Its been proven that the app does nothing, which wipes battstats.ini or something
As for conditioning, its been down to around 3% before being charged. Ivehad the battery 2 weeks now.

Lithium Ion batteries have a very steep drain for about the first 15-20% and also slower charging from those levels. Once past that the drain is nearly linear, and then gets very steep at about 3.6v.
You can see it in the graphs here:
http://www.ibt-power.com/Battery_packs/Li_Ion/Lithium_ion_tech.html

Typically the way our devices are designed, they do not charge the battery to 100% full it can actually cause damage to lithium ion based batteries. what happens is the battery is charged to 95%-98% then the device stops the charge and allows the battery to drop to abut 85%-90% and then starts trickling it again. By design the batteris typically drain a little bit fast at the top level.
further more lithium ion batteries survive more recharge cycles if the D0D (depth of discharge) is about 25% remaining.
Basically you battery will last longer by the device not charging to 100% and letting it discharge slightly when in trickle mode, and if you don't let it die completely and charge it when it reaches around 15%-20% left.

-Mr. X- said:
Typically the way our devices are designed, they do not charge the battery to 100% full it can actually cause damage to lithium ion based batteries. what happens is the battery is charged to 95%-98% then the device stops the charge and allows the battery to drop to abut 85%-90% and then starts trickling it again. By design the batteris typically drain a little bit fast at the top level.
further more lithium ion batteries survive more recharge cycles if the D0D (depth of discharge) is about 25% remaining.
Basically you battery will last longer by the device not charging to 100% and letting it discharge slightly when in trickle mode, and if you don't let it die completely and charge it when it reaches around 15%-20% left.
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Hmm that kind of makes sense. Everyones been telling me to not let it drop to below 35% though cause it 'wears the battery out'. Ive been charging at around 40 cause thats where itd be after a full day at work and such.
Ive been getting concerned though because ive seen screenshots of people getting 31 hours with 7 hours of screen on time.
Im at 62%, 9.5 hours total, 1 hour 7 min screen on. Thats mostly with Wifi on though.
My stock battery used to drop 10% an hour on 4g, and this one dropped ~11% on 4g just now....

mknewman said:
Lithium Ion batteries have a very steep drain for about the first 15-20% and also slower charging from those levels. Once past that the drain is nearly linear, and then gets very steep at about 3.6v.
You can see it in the graphs here:
http://www.ibt-power.com/Battery_packs/Li_Ion/Lithium_ion_tech.html
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Thanks for the graph!
Sent from my amazing G2x running EaglesBlood and Faux.

Now at 36% And its just sitting off mostly with some light texting
Now 35!

Got a weird feeling the battery is messed up.
Its 3900mah, divide by 650 = 6 hour charge
Its been 6 hours and its at 46% with the phone off so its not using power, and on the wall charger.

Rekzer said:
Its been proven that the app does nothing
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I haven't heard that before. Got a source for that info?

mayonaise said:
I haven't heard that before. Got a source for that info?
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http://www.androidcentral.com/wiping-battery-stats-doesnt-improve-battery-life-says-google-engineer

Correct way to charge 5X

Had a Nexus 4 and I did the overnight charge,
Is it the same for the 5X with the rapid charge?
Thanks
Gary

There is not a better way to do it, you can rapid-charge it overnight, during the day, in you car, every 3 minutes with 10 minute pause or whenever you would like to.
For me, I use a normal charger overnight and the rapid charger when I need juice during the day or in the car, or when i forget to plug it overnight.

I remember reading on a reputable tech site about how lithium works, you can leave it overnight with no issues but they have a specific amount of charges in them. E.g. 500 charges for a battery and a charge will be counted anytime it goes above 80% etc. After 500 times, your battery should start to see degradation.
All the above figures are made up but that was the gist of the article i read, so don't worry about leaving your phone plugged in, the os will automatically limit the charge once it reaches 100%.

RedMaio said:
For me, I use a normal charger overnight and the rapid charger when I need juice during the day or in the car, or when i forget to plug it overnight.
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I do the same.
Sent from my Nexus 5X using Tapatalk

Google's take on the subject:
Battery lifespan, charging & usage tips
Good charging practices and care can increase your battery's lifespan. Use the tips below to keep your battery healthy.
6 battery charging & care tips
1. Use the power adapter and charger that came with your device
Other chargers can charge slowly, not at all, or damage your device or battery.
2. Keep it cool
Avoid situations where your device can overheat. Your battery will drain much faster when it's hot, even if you're not using it, and this can even damage your battery. Keep in mind that your device warms up when it's plugged in, so try not to keep it charging all the time.
3. Don't worry about calibrating the battery
You don't need to teach your device how much capacity the battery has by going from totally charged to completely drained.
4. Keep it more than half charged
For the best battery lifespan, try to keep your battery charged above 50% as much as possible.
5. Try to charge a little at a time
Small charges throughout the day are best for battery health. Battery lifespan can suffer if it's charged from zero to full and then completely drained on a regular basis.
6. Store your device half charged
Leave the device with a half-full battery if it needs to be stored for a long time.
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https://support.google.com/nexus/answer/6187455

2 questions about battery?

Hi, I recently bought a Lenovo P2, and so far it seems to me to be a great device.
The battery is great and I usually go to sleep with a 65-70% of charge.
So I have a doubt: Should I charge the phone every night, even if the battery is half charged, or should I wait the battery to reach 25-30% and then charge it?
Also, Does the fast charge ruin the battery if often used?
Thanks

SlugUnchained said:
Hi, I recently bought a Lenovo P2, and so far it seems to me to be a great device.
The battery is great and I usually go to sleep with a 65-70% of charge.
So I have a doubt: Should I charge the phone every night, even if the battery is half charged, or should I wait the battery to reach 25-30% and then charge it?
Also, Does the fast charge ruin the battery if often used?
Thanks
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Wait for 25 to 30 percent and charge till 80 to 85 percent. It'll make your phone battery last really long!!!!

Why not till 100%?

Because these batteries are at their best between 20 and 80%. They don't like being run right down and charging them to 100% increases the wear on them.
So they will last longer by keeping them between 20 and 80%.

philje123 said:
Because these batteries are at their best between 20 and 80%. They don't like being run right down and charging them to 100% increases the wear on them.
So they will last longer by keeping them between 20 and 80%.
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So, those tricks I've read, about discharging till 15% and charging to 100% to calibrate battery, are useless?

Korax94 said:
So, those tricks I've read, about discharging till 15% and charging to 100% to calibrate battery, are useless?
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You read it wrong. To recalibrate the battery you must fully discharge ie. to 0% till the phone shuts down by itself, not to 15%. You can fully discharge once per month. To prolong the battery life span try to charge from 20 to 80%. I know charging up to 100% is nice, but all experts tell us that it's not good for the battery in a long run.
Even partially charging from 20 to 80% you still have ~8-10h SOT so all is fine, 2-3 days on a battery are possible.

after doing a full discharge and a recharge

After doing a full discharge and a full recharge. My battery is doing amazing. I don't know if I should be doing this every day? What do you guys think. I thought it was April 5th update but it was not. Any suggestions?

bradmill08 said:
After doing a full discharge and a full recharge. My battery is doing amazing. I don't know if I should be doing this every day? What do you guys think. I thought it was April 5th update but it was not. Any suggestions?
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You basically let the system calibrate the battery, which I do as well from time to time. I typically go to about 20% then charge to 90-100% Seems to work fine for me :good:

bradmill08 said:
After doing a full discharge and a full recharge. My battery is doing amazing. I don't know if I should be doing this every day? What do you guys think. I thought it was April 5th update but it was not. Any suggestions?
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Badger50 said:
You basically let the system calibrate the battery, which I do as well from time to time. I typically go to about 20% then charge to 90-100% Seems to work fine for me :good:
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I must admit, I still do this every now and then. Though it's up for debate as to the necessity to do it, but my OCD tells me too - especially after flashing a new rom. I'll then let it fully discharge, reboot a couple times until its completely empty, give it a full uninterrupted charge then use a battery calibration app to wipe clean the battery stats app. As mentioned, there'll be some people (rightly or wrongly) who'll disagree with this method with arguments saying that its bad for the battery and/or that the android system is intelligent enough to handle this by itself, which may indeed be true (e.g. perhaps not supposed to drain fully at risk of this being bad for the battery etc.). Though having saying this, I not only feel better for doing so but I, across many devices with this Pixel 2 XL included, experience great battery life throughout the lifespan of me having it.

I don't use any battery calibration apps or anything I don't root my phone at all. I used to do rooting but with stock Android it works awesome without rooting in my opinion.

Wow my phones battery life is amazing now after letting it completely die and charge back up. I am at 90% after almost 6 hours!

Isn't this a bad practice for battery health?

Prattham said:
Isn't this a bad practice for battery health?
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Yeah, it's not recommended to let Li-ion batteries drain completely too often or keep them charged at more than 80-85% for extended periods of time without using them. That's pretty much the reason why phones aren't fully charged when you buy them.

Hi
Battery technology and charging circuits are pretty advanced these days that it should not make any difference doing a full charge cycle, which if anything is not good for the battery. The battery capacity with lithium chemistry is mostly measured by voltage, it's not very precise at full capacities, but as the battery level falls it becomes a more reliable indicator.
I suspect all that is happening is on a full charge cycle, the stresses involved to the battery and effort of the charging circuit pushing a high current into it, is causing the battery voltage to peak higher and remain a bit higher whilst it is full. This has the side effect of causing the battery gauge to read higher for longer, however it will simply even out and drop more quickly as the battery capacity falls, the end result is it doesn't run for any longer, put just feels like it is doing better as the top end of the gauge isn't reading a drop quite as quickly.
The other thing that can cause a seemingly better battery drain is at what time we disconnect the charger when it reads 100%. Typically it will read 100% before it has actually finished charging. This happens as to get from a real capacity of say 90% up to 100% takes a longer time, and it's all about the impression of fast charging these days. Also when the phone is left charging, it will charge and then discharge, then top up, then discharge until its off the charger, as you can't leave the battery continuously trickle charging, and so that it doesn't look broken if we've left it on charge all day and it only reads 95% because a couple of hours ago it stopped charging and is in a run down phase before topping up again, the gauge is set to read 100% even if it is lower.
In other words there is extra capacity in the battery above what we are told is 100% and depending on when we take it from the charger, we might have 105%.
Regards
Phil

Thank you all for your answers! They are really helpful