How many charge their Pixel 2's overnight?

[103Softail]

Prepare for a long read.

http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries

Very interesting. So keep battery charged up and don't use a mega v quick charger. I wonder how wireless charging would stack up?

 

[Mike Dee]

I left my 2 cents a few times on there. All the "my phone stops charging at 100%..." comments both here and in those comments are amusing because no modern charger is going to over charge your battery (defects excluded of course).

I thought the concern was that a battery left on a charger would keep trying to top it off which is supposed to be bad. I'm not saying I agree with that but I think that is what the concern is about leaving it on the charger.

 

[Mooncatt]

Very interesting. So keep battery charged up and don't use a mega v quick charger. I wonder how wireless charging would stack up?

No, they report keeping the battery charged accelerates wear and will cause it to go bad quicker. From a pure lifespan standpoint, you should keep it between about 40-75% charge level (for a decent balance of lifespan and between charge usage, my opinion).

I don't believe they addressed higher voltage charging, at least not that I've seen. Same with wireless charging. I don't have personal experience with wireless charging but a lot of people say it generates a lot of heat. Depending on how much heat is involved, that may or may not be a problem.

I thought the concern was that a battery left on a charger would keep trying to top it off which is supposed to be bad. I'm not saying I agree with that but I think that is what the concern is about leaving it on the charger.

You may be right in their logic, but I think at least one or two claim it shuts off. Either way, the result is the same: A Li-ion battery held at a high charge level.

 

[103Softail]

No, they report keeping the battery charged accelerates wear and will cause it to go bad quicker. From a pure lifespan standpoint, you should keep it between about 40-75% charge level (for a decent balance of lifespan and between charge usage, my opinion).

I don't believe they addressed higher voltage charging, at least not that I've seen. Same with wireless charging. I don't have personal experience with wireless charging but a lot of people say it generates a lot of heat. Depending on how much heat is involved, that may or may not be a problem.

You may be right in their logic, but I think at least one or two claim it shuts off. Either way, the result is the same: A Li-ion battery held at a high charge level.

I don't believe I saw the bit about keeping a battery charged being not optimal for battery life ...except when in high temperatures - but my phone is not in 40-60° C temps so I'm not concerned about that. If you leave your phone inside a car on a summer's day (over here that's 30-40°C) then yeah that's not good. 3 main points are as follows -
1. The smaller the discharge (low DoD), the longer the battery will last(so obviously keep your phone charged up, not necessarily 100% and that will mean smaller discharges - I sit mine on wireless and it's usually 70-90%). If at all possible, avoid full discharges and charge the battery more often between uses. Partial discharge on Li-ion is fine. There is no memory and the battery does not need periodic full discharge cycles to prolong life.
2. A partial discharge reduces stress and prolongs battery life, so does a partial charge. Elevated temperature and high currents also affect cycle life.
3. The worst situation is keeping a fully charged battery at elevated temperatures

 

[LeoRex]

I've read that some devices that need to be "at the ready" and always plugged in to stay charged (from laptops to emergency equipment) will not charge to 100% if using a lithium battery. They will only charge to about 75% and stay there to ensure they are ready to go without degrading the battery.

Yeah, those types of systems are often used in things like flashlights and handheld radios for emergency response applications... Where some gear might be left untouched for extended periods... And when they are needed, the last thing the user wants to do is fuss with replacing a battery pack, etc.

 

[Mooncatt]

I don't believe I saw the bit about keeping a battery charged being not optimal for battery life ...except when in high temperatures - but my phone is not in 40-60° C temps so I'm not concerned about that. If you leave your phone inside a car on a summer's day (over here that's 30-40°C) then yeah that's not good.

The paragraphs just below the temperature discussion, and tables 4-6 go over the effects of charging and leaving charged at different voltages.

One thing to note is this article refers to traditional Li-ion batteries with a nominal 3.7V/4.2V max rating. Newer batteries can be designed for 3.8V/4.3V respectively. So while the concepts would be the same, those higher voltage batteries may go that little bit higher in charge voltage without the same negative effects.

 

[jamezr]

I generally charge all of my phones overnight. This way they start the day with a full charge. My current daily driver Pixel 2 XL storm trooper is right on my night stand.

 

[103Softail]

The paragraphs just below the temperature discussion, and tables 4-6 go over the effects of charging and leaving charged at different voltages.

One thing to note is this article refers to traditional Li-ion batteries with a nominal 3.7V/4.2V max rating. Newer batteries can be designed for 3.8V/4.3V respectively. So while the concepts would be the same, those higher voltage batteries may go that little bit higher in charge voltage without the same negative effects.

Cycling between 85 and 25 percent (green) provides a longer service life than charging to 100 percent and discharging to 50.
So keep ur battery topped up (but not necessarily fully charged) and don't let it run dry.
Lots of other variables not withstanding - and keep away from heat

 

[Morty2264]

I generally charge all of my phones overnight. This way they start the day with a full charge. My current daily driver Pixel 2 XL storm trooper is right on my night stand.

Yup, I love starting the day off with a full charge. Feels weird when I don't.

 

[wyelkins]

Of course, makes sense to do it while I am sleeping no matter what level the phone is at.

 

[EMGSM]

Look like we made it to the front page of Android Central

https://www.androidcentral.com/do-you-charge-your-phone-while-you-sleep

Yay me too...at least my thread did

 

[EMGSM]

I use my pixel as a clock at night so I keep it plugged in.