battery charge - 80% alarm

gim

macrumors 6502
Original poster
Jul 27, 2014
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So I'm looking for an App that rings an alarm when my iOS devices are hitting 80% while charging. So far I've only found several apps that would notify me when the device is fully charged. Any chance there is an app out there that lets you set a custom alarm regarding the battery percentage?

Please don't try to teach me anything about batteries and if it's good if you don't regularly charge them to 100%.
I've had very good experience with the longevity of my batteries when I only used them between 20 and 80%.

I am thankful for every hint regarding an appropriate app.
 
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Gav2k

macrumors G3
Jul 24, 2009
9,217
1,606
So I'm looking for an App that rings an alarm when my iOS devices are hitting 80% while charging. So far I've only found several apps that would notify me when the device is fully chargeds. Any chance there is an app out there that lets you set a custom alarm regarding the battery percentage?

Please don't try to teach me anything about batteries and if it's good if you don't regularly charge them to 100%.
I've had very good experience with the longevity of my batteries when I only used them between 20 and 80%.

I am thankful for every hint regarding an appropriate app.
For android there are plenty I've not come across any on iOS.

I'll say nothing more as requested ;)
 
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DeltaMac

macrumors G4
Jul 30, 2003
10,333
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OK, also nothing much to add, except a question (no teaching here, either :D )

How did you settle on the arbitrary "80%" as your ideal maximum charge?

Sounds like some number associated with NiCad batteries, but not sure if I remember accurately that far back...
 
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gim

macrumors 6502
Original poster
Jul 27, 2014
409
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OK, also nothing much to add, except a question (no teaching here, either :D )

How did you settle on the arbitrary "80%" as your ideal maximum charge?

Sounds like some number associated with NiCad batteries, but not sure if I remember accurately that far back...
Well, on a regular day I simply don't need more than 60% of battery. So instead of using the top 60% and going 100% -> 40% every day, I usually go for the middle 60%, so it's 80% -> 20%.
 

Gav2k

macrumors G3
Jul 24, 2009
9,217
1,606
OK, also nothing much to add, except a question (no teaching here, either :D )

How did you settle on the arbitrary "80%" as your ideal maximum charge?

Sounds like some number associated with NiCad batteries, but not sure if I remember accurately that far back...
Remember that 80-100% is charged at a different rate too. But cycling the battery once in a while is advisable. (Not that I'm offering any advice. Though it does sound like I am. Damn it)
 

DeltaMac

macrumors G4
Jul 30, 2003
10,333
2,736
Delaware
Well, on a regular day I simply don't need more than 60% of battery. So instead of using the top 60% and going 100% -> 40% every day, I usually go for the middle 60%, so it's 80% -> 20%.
OTOH, if you used 90% -> 30%, your experience would be more consistent, as you would then not "risk" going into the low power mode at >20%. Maybe that's not a concern for you, but there it is.
Or, 70>10 would be even better, as you would spend a good amount of time in the low power mode, and would normally take longer to use that same 60%.
 

now i see it

macrumors 603
Jan 2, 2002
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10,782
Charge Alarm Pro



Charge Alarm Pro by John Kowalik
https://appsto.re/us/hzr2_.i


You can have it ring an alarm (many to choose from) at any % state of charge. Not just 80%.

Caveat is that the app has to be in the foreground to work. No lock screen, not in the background.

So it's good if you want to put your phone on a charger and then leave it undisturbed and then have it set off an alarm at your chosen state of charge....

But if you want to use your phone while it's charging, this app is worthless and won't work.
 
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gim

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Original poster
Jul 27, 2014
409
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OTOH, if you used 90% -> 30%, your experience would be more consistent, as you would then not "risk" going into the low power mode at >20%. Maybe that's not a concern for you, but there it is.
Or, 70>10 would be even better, as you would spend a good amount of time in the low power mode, and would normally take longer to use that same 60%.
Thanks for your input!
As of today, I am still using an ancient iPhone 4 with iOS 7, so there is no low power mode.
But I will consider this strategy for my new iPhone SE :)

Charge Alarm Pro



Charge Alarm Pro by John Kowalik
https://appsto.re/us/hzr2_.i


You can have it ring an alarm (many to choose from) at any % state of charge. Not just 80%.

Caveat is that the app has to be in the foreground to work. No lock screen, not in the background.

So it's good if you want to put your phone on a charger and then leave it undisturbed and then have it set off an alarm at your chosen state of charge....

But if you want to use your phone while it's charging, this app is worthless and won't work.
Thank you so much, this app is exactly what I was looking for. :) Tested it on my iPad Air and it worked flawlessly. It even works when the device is locked, as long as the app is in the foreground when you lock the device. Awesome!
 

now i see it

macrumors 603
Jan 2, 2002
5,324
10,782
I am thankful for every hint regarding an appropriate app.
This is ankther really good app.
Works in the background and you can set low or high alarm (one beep and notification) at any % charge you want.
I think it's great. Good for charging while you're using it to remind you to unplug or reminding you to plug in while using it (or not using it) at your set level.

Low Battery - Phone battery power glance & notifications by Ben Guild
https://appsto.re/us/3ed2N.i

image.jpeg
 
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mvsvika

macrumors newbie
Mar 3, 2015
4
0
OK, also nothing much to add, except a question (no teaching here, either :D )

How did you settle on the arbitrary "80%" as your ideal maximum charge?

Sounds like some number associated with NiCad batteries, but not sure if I remember accurately that far back...
With all due respect, 80% is Not an arbitrary figure. Please check out " Battery University " https://batteryuniversity.com/. It is explained 80% Maximum charge and 40% minimum charge. Go beyond these parameters and the battery is "Stressed " . Please follow the link above. You're Welcome

OK, also nothing much to add, except a question (no teaching here, either :D )

How did you settle on the arbitrary "80%" as your ideal maximum charge?

Sounds like some number associated with NiCad batteries, but not sure if I remember accurately that far back...
 

C DM

macrumors Sandy Bridge
Oct 17, 2011
48,812
17,459
With all due respect, 80% is Not an arbitrary figure. Please check out " Battery University " https://batteryuniversity.com/. It is explained 80% Maximum charge and 40% minimum charge. Go beyond these parameters and the battery is "Stressed " . Please follow the link above. You're Welcome
What talks about the battery being stressed being outside of those percentages, at least to the point where it's actually detrimental to it in a meaningful/noticeable way?
 

mvsvika

macrumors newbie
Mar 3, 2015
4
0
With all due respect, 80% is Not an arbitrary figure. Please check out " Battery University " https://batteryuniversity.com/. It is explained 80% Maximum charge and 40% minimum charge. Go beyond these parameters and the battery is "Stressed " . Please follow the link above. You're Welcome
[doublepost=1544904130][/doublepost]
What talks about the battery being stressed being outside of those percentages, at least to the point where it's actually detrimental to it in a meaningful/noticeable way?
Please read the Entire article https://batteryuniversity.com/. About 26 pages. Can't say which page but the information is Excellent. How an old PowerBook G4 15 ". The battery lasted for almost 3 years.
[doublepost=1544904487][/doublepost]
With all due respect, 80% is Not an arbitrary figure. Please check out " Battery University " https://batteryuniversity.com/. It is explained 80% Maximum charge and 40% minimum charge. Go beyond these parameters and the battery is "Stressed " . Please follow the link above. You're Welcome
No arbitrary 80% figure . That percentage is straight from https://batteryuniversity.com/. Please read Entire article some 26 pages, Excellent information , also No teaching here :). Best regards
 

gim

macrumors 6502
Original poster
Jul 27, 2014
409
918
Arbitrary or not, my charging rule still works great.
5 year old iPad Air, way over 1000 charging cycles now, still 91% of the original capacity left.
 

C DM

macrumors Sandy Bridge
Oct 17, 2011
48,812
17,459
[doublepost=1544904130][/doublepost]
Please read the Entire article https://batteryuniversity.com/. About 26 pages. Can't say which page but the information is Excellent. How an old PowerBook G4 15 ". The battery lasted for almost 3 years.
[doublepost=1544904487][/doublepost]
No arbitrary 80% figure . That percentage is straight from https://batteryuniversity.com/. Please read Entire article some 26 pages, Excellent information , also No teaching here :). Best regards
Something in particular has to address that 80% mark and that it's actually meaningfully/noticeably detrimental beyond that. Just saying read the whole site that has tons of information isn't really going to address a particular point (and, yes, over the years I've read a lot of what's on the site, as have many others I'm sure).
 

mvsvika

macrumors newbie
Mar 3, 2015
4
0
So I'm looking for an App that rings an alarm when my iOS devices are hitting 80% while charging. So far I've only found several apps that would notify me when the device is fully charged. Any chance there is an app out there that lets you set a custom alarm regarding the battery percentage?

Please don't try to teach me anything about batteries and if it's good if you don't regularly charge them to 100%.
I've had very good experience with the longevity of my batteries when I only used them between 20 and 80%.

I am thankful for every hint regarding an appropriate app.
[doublepost=1545292660][/doublepost]The app you're looking for is called " Fruitjuice" available on the iOs application store or iTunes. Good luck, Best regards. M. Svika
 

arsharpe

macrumors newbie
May 24, 2019
1
1
Glad to hear from someone thinking the same.

I am developing an external bluetooth controlled USB switch to remove the need to manual plug-in/out. It automatically controls the charger to keep the battery around the best storage charge level to extend the battery shelf cycle and minimise deep-discharge effect on cycle life.

When I had a new iPhone the battery arrived at 60% so that is probably the best shelf life charge level. The default setting for my product will be to turn charger on at 55% and off at 65%. Longer term there will be a facility to automatically charge to 80 or 100% ready for a given time (eg a long unpowered trip).

I will be starting a user group (probably on LinkedIn) to evaluate some prototypes and get user feedback. If you are anyone else wants to get involved please let me know.
 
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gim

macrumors 6502
Original poster
Jul 27, 2014
409
918
It seems the new ios13 has the feature inbuilt that controls the charging past 80%.
View attachment 847081
Yes, this is good news for me! Looking forward to using that feature, but I think it's mainly designed for overnight charging. Meaning that it doesn't directly charge to 100 when you plug it in in the evening, but it's waiting until 4am or so to charge from 80 to 100.
 

jrg2019

macrumors newbie
Jul 6, 2019
2
0
Yes, this is good news for me! Looking forward to using that feature, but I think it's mainly designed for overnight charging. Meaning that it doesn't directly charge to 100 when you plug it in in the evening, but it's waiting until 4am or so to charge from 80 to 100.
Yeah. It does give good merit to the 80% rule. I generally charge my phone when in the office most of the day so will be interesting what does it during the day.
 

bp1000

macrumors 65816
Jul 7, 2011
1,341
48
Just wish it was possible to stop the charge at 80%
In the latest iPhones 80% is plenty. 100% for me is only needed if I’m travelling.
 

now i see it

macrumors 603
Jan 2, 2002
5,324
10,782
Apple has very little interest in providing a charge profile on an iPhone that will allow the battery to discharge 2000 cycles or more (via an 80% maximum charge). They make a ship load of money (in the tens of millions of dollars?) replacing prematurely worn out batteries that are getting thrashed by the high
voltage from always being charged to 100%.
Rapid battery degradation is built into their business model. There's also a reason the battery is extremely difficult to replace - to discourage replacements by customers. A worn out battery is the driving force most people decide to buy a new iPhone because the battery replacement on an old iPhone is expensive enough to not seem worth it to a lot of people.

If you want your battery to outlast the phone (and it definitely can) you're going to have to keep an eye on charging and unplug at 80%.

There are Bluetooth smart wall sockets (Revogi) that can be programmed with a timer to shut off after a selected time. It's easy to use one of those to shutoff charging early. After a while, experience will show you about how long it takes to charge up from a certain low value to 80%.

Or just plug in the phone to the apple charger and forget about it and not fret over it.
Replacing the battery every 2 years for $68 is a lot easier than fussing over maximum charge cutoff every single day
 
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BigMcGuire

macrumors 603
Jan 10, 2012
5,534
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California
Not trying to teach - my experience:

I have monitored my iPhone batteries via coconutBattery on an excel spreadsheet for years (since my iPhone 6+). I usually keep my phones 2 years. Most of my phones spend the majority of their lives at >90%.

I've found that after 1.5-2 years most of the phones are within 2-3% of their capacity (only one went beyond 6%) when new. (6+, 6s+, 8+, Xs Max, and now 11 Pro Max).

I believe the >90%+ trickle charging helps the longevity of these batteries vs <80% full charging all the time.


Would LOVE the ability to restrict the battery to 40-80% or something like that - Tesla does something similar with their massive battery banks in their cars.


Yeah, the iOS 13 battery health option - Optimize Battery Charging has really only worked for me overnight if I leave my phone plugged in.


What I really wish the iPhone had was the ability that MacBooks have - to draw power from the wall exclusively instead of always through the battery. My MacBook, once charged, will stop using battery at all, and just draw from the wall when at >=95%. This results in very few charge cycles being used.
 

gim

macrumors 6502
Original poster
Jul 27, 2014
409
918
I usually keep my phones 2 years.
Yeah, it doesn't really matter how you charge your phone then.

In my house, most people use their phones for as long as they're good. That means until they break or don't get OS updates anymore.

Here's what we've got.

Devices charged under 20-80% rule:

iPhone 6 Plus - release day device with original battery (>5 years old)
1003 cycles - 93% capacity
--- battery has outlived the phone ---

iPhone 7 - release day device with original battery (>3 years old)
560 cycles - 91% capacity
--- battery will probably outlive the phone---

This phone is an outlier because it was occasionally used for navigation on long road trips. Therefore it spent more time charged at 100%, and therefore has lower remaining capacity than the other 2 devices, which are much older.

iPad Air (2013) with original battery (almost 6 years old)
772 cycles - 92% capacity
--- battery has outlived the device ---

Devices charged to 100% every night:

iPhone 6s Plus with replacement battery from Apple
402 cycles - 79% capacity (should be replaced again)
--- needs 3 batteries (2 replacements) total to be useable until phone turns obsolete ---

+ roughly a dozen devices of friends/family that I know of because they wanted me to tell them their cycle count and remaining capacity. All phones that were charged overnight were significantly worse on battery. Basically all of them were on track, or had already hit 80% capacity after roughly 2 years.
 
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BigMcGuire

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Jan 10, 2012
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Yeah, it doesn't really matter how you charge your phone then.

In my house, most people (only one exception) use their phones for as long as they're good. That means until they break or don't get OS updates anymore.

Here's what we've got.

Devices charged under 20-80% rule:

iPhone 6 Plus - release day device with original battery (>5 years old)
1003 cycles - 93% capacity
--- battery has outlived the phone ---

iPhone 7 - release day device with original battery (>3 years old)
560 cycles - 91% capacity
--- battery will probably outlive the phone---

This phone is an outlier because it was occasionally used for navigation on long road trips. Therefore it spent more time charged at 100%, and therefore has lower remaining capacity than the other 2 devices, which are much older.

iPad Air (2013) with original battery (almost 6 years old)
772 cycles - 92% capacity
--- battery has outlived the device ---

Devices charged to 100% every night:

iPhone 6s Plus with replacement battery from Apple
402 cycles - 79% capacity (should be replaced again)
--- needs 3 batteries (2 replacements) total to be useable until phone turns obsolete ---

+ roughly a dozen devices of friends/family that I know of because they wanted me to tell them their cycle count and remaining capacity. All phones that were charged overnight were significantly worse on battery. Basically all of them were on track, or had already hit 80% capacity after roughly 2 years.
Agreed completely. I envy the people in your house. They are far more environmentally friendly and save far more money than I do! :)

I'm very impressed with your capacity rates given the number of cycles. Very interesting observations and calculations. Stuff like this is a hobby of mine so I very much appreciate your findings and will be studying them to learn from them.

Thank you :D.
 
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