The never ending battery charging topic

[Rodan52]

I was curious about the notification I was receiving on my new iPhone SE.
It says, "To reduce battery ageing, iPhone learns from your daily charging routine so it can wait to finish charging past 80% until you need to use it."
Initially that just made no sense to me. How would it know when I needed to use it? It would need to know in advance too, in order to complete charging to 100%. So this morning I checked my battery before disconnecting from the charger and it was 100% as usual.
So, I wondered how does this work? After a little searching i found this; About Optimised Battery Charging on your iPhone – Apple Support

"Your iPhone uses on-device machine learning to learn your daily charging routine so that only Optimised Battery Charging activates when your iPhone predicts it will be connected to a charger for an extended period of time. The algorithm aims to ensure that your iPhone is still fully charged when unplugged."

To achieve this there are a couple of settings that need to be turned on.

• Settings > Privacy > Location Services > Location Services.
• Settings > Privacy > Location Services > System Services > System Customisation.
• Settings > Privacy > Location Services > System Services > Significant Locations > Significant Locations.

Like me you will probably find they are all turned on by default.
The upshot of all this is that Apple obviously consider it is not good for battery life to leave your iPhone on charge once it has reached 100%.

 

[tehStickMan]

yep 10-80% battery is best for it.

But it's a consumable. Use it however you require.

 

[muhle]

I was curious about the notification I was receiving on my new iPhone SE.
It says, "To reduce battery ageing, iPhone learns from your daily charging routine so it can wait to finish charging past 80% until you need to use it."
Initially that just made no sense to me. How would it know when I needed to use it? It would need to know in advance too, in order to complete charging to 100%. So this morning I checked my battery before disconnecting from the charger and it was 100% as usual.
So, I wondered how does this work? After a little searching i found this; About Optimised Battery Charging on your iPhone – Apple Support

"Your iPhone uses on-device machine learning to learn your daily charging routine so that only Optimised Battery Charging activates when your iPhone predicts it will be connected to a charger for an extended period of time. The algorithm aims to ensure that your iPhone is still fully charged when unplugged."

To achieve this there are a couple of settings that need to be turned on.

• Settings > Privacy > Location Services > Location Services.
• Settings > Privacy > Location Services > System Services > System Customisation.
• Settings > Privacy > Location Services > System Services > Significant Locations > Significant Locations.

Like me you will probably find they are all turned on by default.
The upshot of all this is that Apple obviously consider it is not good for battery life to leave your iPhone on charge once it has reached 100%.

is this the Se2020? also, did it have a "last charge" date when you got it?

 

[Rodan52]

Yes this is the SE2 (2020). After quite a bit of nosing around it would appear that the best conditions for a Lithium battery (in an iPhone) are:

Don't leave or store at 100% charge
Don't discharge below 30%.

This last point is a little contestable because the iPhone does not offer to swap to Low Power Mode until <20% but Apple do not have a good track record for giving the best battery advice and nowadays don't really offer any at all.

None the less this is just benchmark advice, nobody is going to be able to adhere to restrictions like that the best a user can do is keep them in mind and try to work within them where possible.

 

[muhle]

Yes this is the SE2 (2020). After quite a bit of nosing around it would appear that the best conditions for a Lithium battery (in an iPhone) are:

Don't leave or store at 100% charge
Don't discharge below 30%.

This last point is a little contestable because the iPhone does not offer to swap to Low Power Mode until <20% but Apple do not have a good track record for giving the best battery advice and nowadays don't really offer any at all.

None the less this is just benchmark advice, nobody is going to be able to adhere to restrictions like that the best a user can do is keep them in mind and try to work within them where possible.

have you charged it yet or are you still running it on whatever charge it had when you got it?

 

[iBozz]

Thanks, Rodan52, you have, I hope, answered a question where a solution has eluded me.

Since getting my SE 2020 my Daily Charging Routine has changed permanently. I had not, under the "old" habit, never checked the charging history so have no idea whether it had leant to stop at 80% until I "needed" the phone.

However, since changing my routine I have been checking and the battery has been charged to 100% fairly quickly after being plugged in overnight and, clearly, the 80% facility wasn't being adopted. Until I saw your post, i assumed that it was still re-learning my routine even though it appeared to be a very slow learner!

However, following your OP, I checked the various Location Services settings and i noticed that Significant Locations was not enabled.

I am hoping that switching that on will now allow the iPhone to learn my new routine and thus adopt the 80% feature.

if anyone has any comments or further advice then i'd be delighted to hear from you.

Thanks, Rodan52, for pointing me (I hope!) in the right direction.

 

[MiamiBeach]

It took a while for my phone to learn my charging habits (mostly my fault!), however I now often see it charging to 80% and then holding the last 20% until an hour or so before I get up in the AM. I see it on settings -> battery.

 

[iBozz]

It took a while for my phone to learn my charging habits (mostly my fault!), however I now often see it charging to 80% and then holding the last 20% until an hour or so before I get up in the AM. I see it on settings -> battery.

I changed the settings as I said above and it is still learning!