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Battery extended life span suggestions


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Hello everyone.   I was hoping if you guys have some insight are extending the life span of the battery.   I've heard 2 suggestions that are completely different.   1 was letting your phone get down too 5% and then charge it back to 100%. 2nd was only charge to 80% and never let it go down below 20%.  What's your thoughts and suggestions?

Thank you

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One of the most important things is to avoid charging the phone when it is hot.

LiIon battery do not like being charged while above roughly 30°C. They prefer around room temperature.
So better to charge a device before doing some heavy work, than after, when it is still hot.

Moderate charging is best, I would suggest 30-80% BUT you need to occasionally do full charge as well as discharge, to keep the system calibrated.

I have numerous entries on various aspect of the subject in this category on my blog. (the most basic of them at the bottom from ten years ago)

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Deep-discharging being a good thing is a popular myth from Ni-Cd-battery times. Li-ion batteries do not like that.

@EskeRahn is right in that temperature is a decisive factor. Using QuickCharge (tm)  results in my Pro1(not X) becoming so hot it is uncomfortable to touch. I hence avoid quick-charge by using only my PC USB-ports for charging.

Edited by claude0001
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Posted (edited)
1 hour ago, EskeRahn said:

One of the most important things is to avoid charging the phone when it is hot.

LiIon battery do not like being charged while above roughly 30°C. They prefer around room temperature.
So better to charge a device before doing some heavy work, than after, when it is still hot.

Moderate charging is best, I would suggest 30-80% BUT you need to occasionally do full charge as well as discharge, to keep the system calibrated.

I have numerous entries on various aspect of the subject in this category on my blog. (the most basic of them at the bottom from ten years ago)

@EskeRahn How often would you say do a full charge and discharge? Discharge meaning completely dead battery correct? 

Edited by Mysti-Que2020
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@claude0001 with this having li-on batteries its OK to charge full but avoid quick charge at all cost and letting it completely die I should avoid? Just want to double check because reading how everyone has been waiting months for warranty repairs on their Fx pro1,  I want to try to avoid that at all cost. 

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Deep discharge should indeed generally be avoided, though the system should do an auto-shutdown before the voltage drop starts.

The only benefit is calibration, so perhaps once a year.

Similar the system ought to take care of not overcharging too (it charges slower towards the end), and in daily life it is hard to stop the charging below full. Some software exists allowing more control, but AFAIK only for rooted devices.

So my general advise is to use a slow charger, when the device is idle, e.g. at night.

(More hints see e.g. this )

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PS And we NEVER want the battery to go deeper than when the OS do an Auto-shutdown, that is when it detects the voltage drop point is reached.
Trying to charge a phone in this state will likely fail, if people did NOT set

fastboot oem off-mode-charge enable

Apart from the battery health, deep discharge can -if the above is not set- cause the phone to get in a state where you can not charge it. See e.g. the thread by @Spargeltim here.

It is really annoying that phones usually come with this switch set in a way that might render it in need of service, if it depletes.

 

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10 hours ago, Mysti-Que2020 said:

How often would you say do a full charge and discharge? Discharge meaning completely dead battery correct? 

From what I gathered, every 70-200 recharges, depending how much you recharge each time. If you are very consistent in the charge/discharge cyles and you generally keep the battery between 10ºC<35ºC cool while (accepting exceptions) not charging above ~80%, 1ce per year should be enough. I've treated laptops like that (previous Li-ion phones too) and batteries last for way beyond the time they are supposed to.

Do keep in mind that lithium batteries are exponentially more resilient to temperatures outside ideal temperature specs when they are in the approximate range of 20%~80% than otherwise.

Edited by brunoais
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9 hours ago, EskeRahn said:

It is really annoying that phones usually come with this switch set in a way that might render it in need of service, if it depletes.

Surely you must mean "that fxtec phones usually..."? Im confused, because I have litterally never had another device where the stock rom acts this way. Sure, I have used custom roms where offline charging hasnt been a thing, but stock rom?

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3 hours ago, toast said:

Surely you must mean "that fxtec phones usually..."? Im confused, because I have litterally never had another device where the stock rom acts this way. Sure, I have used custom roms where offline charging hasnt been a thing, but stock rom?

I have fiddled with this on other phones, but so long back that I do not recall which ones. But glad to hear if some do not have this silly default. Thank

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