Will draining the battery to zero hurt the battery life?

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Android Central Question

Hello. One accidentally allowed my Pixel 6 battery too drain to zero several times and I'm wondering if that will impact battery life. I noticed estimated capacity according to AccuBattery was 4,680 mAh in April but it's now 4,634 mAh. Is that bad? Thank you.
 
Welcome to Android Central.

Allowing your phone to shut off due to a low battery is bad all around. Suddenly pulling the plug on a computer, these are all little computers, doesn't allow process to close or end properly. This can corrupt data, damage apps and create all kinds of issues with the performance of the device. Done often enough some of this damage can become permanent. Once here or there on accident can still cause damage but the system is designed to try and repair that.

As for the battery, yes it can be damaged also. These batteries don't want to be completely drained nor do they want to be fully charged. This is why you'll hear many say they don't let their battery go below 20% and only charge to 80-85% keeping the charge right in the middle. Letting your battery completely drain excessively will affect it's health and overall life.

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It is recommended to not let your battery drain less than 15-20% and to only charge up to 80-85%. This extends your battery's life cycle. Letting you're battery drain to 0% is definitely not recommended and there have been problems with phones unable to charge or turn on after being drained to 0%.
 
Welcome to Android Central! I would say that it's definitely not a good idea to let a phone battery drain to 0% on a regular basis, primarily because that kind of habit will lead to an overall shorter battery lifespan. But an occasional drain to zero generally won't damage the battery in an immediate sense. We all run into situations where we forgot to charge the phone, or perhaps some rogue app or process caused the battery to drain quickly while we weren't aware of it, and the battery went to zero -- this kind of occasional thing is ok.

So as a rule of thumb, make sure to start charging the phone when the battery gets to 20-30%, and you'll help prolong the battery's overall lifespan. But if there's the occasional deep discharge, don't worry too much about it -- just don't make a habit of it!
 
Yes, but let's be honest, very few of us will daily drive that phone long enough for it to really matter, will we?

That's usually my perspective as well -- the majority of people will hold onto a phone for about 2 years tops on average, and that's usually not long enough to see the effect on the battery. But there certainly have been people on the forums who have been vocal about wanting to keep their phones for much longer (like 4-5 years), so this is where good battery charging discipline becomes much more important.

I'd also note that my wife's Pixel 5 (which is about 2 years old) is starting to show signs of battery wear. It drains faster now, and Accubattery says the health is down to 88% (85% is generally felt to be where you can really see the effects). She doesn't let the battery drain to zero, but it's often down to the 20s before she starts charging it. My old Pixel 3 XL's battery health was down to about 90% after a little over 2 years (before it died), and my charging habits were typically to charge when it got down to 30-40%, but would then charge up to 100%. I'm trying to be a little more conscious about this with my 6 Pro, taking it off charger when it hits 80% about half the time.
 
Agreed. I was fanatical and obsessive about Accubattery, compulsively checking it for my phone's health. The alert was nice that let me know it was charged to a certain percentage, something that my Samsung does (85% cap), but my Pixel doesn't.

I still try to stop charging at around 80-85%, but I haven't installed any apps to help me with this process, and if there are days I know I'll need more juice (trip to Disneyland, day at the beach), then I'll excise a full charge.

I'm always so torn about using my phone as GPS though, as when I do, it's often as GPS for long drives, along with being the device I use to listen to videos on YouTube to. It's such a battery drain, but I've also read that you shouldn't charge and use your phone at the same time. In addition, it's usually on the dashboard, meaning it's exposed to the sun the entire time. My workaround has been to use a phone until I round 30%, then just switch my SIM into another phone at a rest stop and use that while the other phone charges. My wife laughed at my obsessiveness, and I agree...truly, it's a 1st world problem.
 
Agreed. I was fanatical and obsessive about Accubattery, compulsively checking it for my phone's health. The alert was nice that let me know it was charged to a certain percentage, something that my Samsung does (85% cap), but my Pixel doesn't.

I still try to stop charging at around 80-85%, but I haven't installed any apps to help me with this process, and if there are days I know I'll need more juice (trip to Disneyland, day at the beach), then I'll excise a full charge.

I'm always so torn about using my phone as GPS though, as when I do, it's often as GPS for long drives, along with being the device I use to listen to videos on YouTube to. It's such a battery drain, but I've also read that you shouldn't charge and use your phone at the same time. In addition, it's usually on the dashboard, meaning it's exposed to the sun the entire time. My workaround has been to use a phone until I round 30%, then just switch my SIM into another phone at a rest stop and use that while the other phone charges. My wife laughed at my obsessiveness, and I agree...truly, it's a 1st world problem.

That all sounds prudent. I agree about using the phone as a GPS nav device -- it's best to use a vent mount, so that the phone isn't exposed quite so directly to sunlight and has cool air blowing directly on it. I've seen my phone give high temp warnings or just plain shut down when mounted as a nav device on top of the dash or stuck to the windshield.
 
Yeah, except this one time I forgot I was using the heater and had my phone in front of the vent for the entire trip. Sufficed to say, I was quite upset at my absentmindedness =/
 
Yeah, except this one time I forgot I was using the heater and had my phone in front of the vent for the entire trip. Sufficed to say, I was quite upset at my absentmindedness =/

That’s a pretty good one.

Another neat trick that you may care to try is to put your phone in your pocket with the flashlight on, and not realise it for forty-five minutes. :(
 
Don’t laugh too soon. That may soon be necessary for UK members.
However, we are not monsters. I for one intend to eat my own backside, which, we can surely all agree, is less impolite than eating that of others.

139DBAFE-86FC-4DA0-A9BF-176C3D317338.jpeg
 
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Don’t laugh too soon. That may soon be necessary for UK members.
However, we are not monsters. I for one intend to eat my own backside, which, we can surely all agree, is less impolite than eating that of others.

View attachment 345182

Well at least if our food insecurity fears come true, we can always cook something up with our phones :p These little devices are getting handier all the time lol.
 

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