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The iOS option to charge battery to "80% Limit" shouldn't just be for iPhone 15

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Re: The iOS option to charge battery to "80% Limit" shouldn't just be for iPhone 15

#91

Earlier quoted context omitted.

I would be unhappy if my phone has 20% battery left but I can't make a call or check map/WhatsApp.

iOS already does something like this. After the phone turns off from low battery, it’ll still allow you to use Apple wallet for a few hours.

It's a bit similar, but it sounds like that's less than 1% of the battery.

I already expect my phone to die fast when it gets under 5%.

Re: The iOS option to charge battery to "80% Limit" shouldn't just be for iPhone 15

#92

I can't imagine caring about this honestly. The way i feel it is like constantly caring if your white shoes are dirty, i only trust my shoes to help me walk. Technology should be as transparent as possible in my opinion and not bring us back to thinking about said technology, just what we can do with it. It's tiresome enough to worry about having a charged phone, i couldnt bring myself to look at battery percentage o…

This is just an optional feature, nobody is forcing you to turn it on, or to care about it. Personally I rarely need a 100% charge: my iPhone 13 easily gets through a typical day with 40% remaining. But I do get annoyed when a phone is 2 or 3 years old and the battery is already worn out. Genuine iPhone batteries are expensive, and limiting charging to 80% will significantly extend their life.

Worn out batteries don't just have limited capacity, they charge slower and create more heat while charging due to internal resistance. I'd much rather charge to 80% for my typical day, but have the option to 100% charge on those rare occasions when I know I might need it (long day travelling, etc).

Re: The iOS option to charge battery to "80% Limit" shouldn't just be for iPhone 15

#93
post #68

Glancing at some comments here mentioning the overnight charging feature working for them, am I in the minority by charging randomly whenever it needs it? My charger isn't even in the bedroom. Curious how my random on/off habits compare to overnighters in long term battery health. I try to take it off around 80% so I was interested in this feature and confused when the update didn't include it. I don't like that it's…

The world of lithium-ion battery chemistry is quite complicated, but in my experience, the top contributors to battery wear-out are, in decreasing order of severity: - Charge cycles (including partial cycles, e.g. 100% -> 50% is half a charge cycle) - Depth of discharge (deeper discharge cycles are worse) - Extended periods in hot conditions (over 40 degrees Celsius) - Extended periods of being held at 100% state of…

I think another huge killer of lithium batteries is charging them when below freezing. I bet most phones probably wouldn’t allow it though - or at least would limit it.

Re: The iOS option to charge battery to "80% Limit" shouldn't just be for iPhone 15

#96

I can't imagine caring about this honestly. The way i feel it is like constantly caring if your white shoes are dirty, i only trust my shoes to help me walk. Technology should be as transparent as possible in my opinion and not bring us back to thinking about said technology, just what we can do with it. It's tiresome enough to worry about having a charged phone, i couldnt bring myself to look at battery percentage o…

If iPhones have replaceable batteries (the kind you can slot in and out) then you’d be right.

Replacing an iPhone battery at an Apple Store costs about 1/3 the price of the phone by the time you need it replaced, so ideally one would want the battery to last as long as the lifetime of the phone. One way to delay liion battery ageing is to shallow charge.

Case in point I’ve a 6 year old dell laptop that is set to shallow charge to 75% in BIOS and the battery still holds 3 hours of charge (from 75% to forced standby)to this day. Most laptop battery stop holding a charge 2 to 3 years in.

Re: The iOS option to charge battery to "80% Limit" shouldn't just be for iPhone 15

#97

> The difference is that Optimized Charging kicks in only when your iPhone is normally idle, typically overnight. The new 80% charging feature (that’s limited to iPhone 15 models) doesn’t try to be as smart, and simply works all day long. That’s not how the Optimized Battery feature works, according to the help text displayed right next to the feature in the Battery Health settings. I question the whole premise of th…

> That’s not how the Optimized Battery feature works Please say what the difference is, then?

It slows down and times its charging to reach the 100% right before you get up in the morning, rather than immediately after you plug it in (which would make it 100% all night long).

Re: The iOS option to charge battery to "80% Limit" shouldn't just be for iPhone 15

#98
post #90
post #81

Earlier quoted context omitted.

Having the majority of your usage / charge cycles being based on a 50 to 80% total charged will increase the total cycles (and the battery’s total life).

Artificially limiting yourself to 40% of your battery’s capacity to extend its life seems like an enormous waste of effort My last phone spent like 8-10 hours a day on and off a wireless charger and had 88% battery health when I sold it over two years after I bought it

I'm pretty sure 88% health means like 80% original capacity since iPhones actually shut off at 20% real capacity to protect the cell.

Re: The iOS option to charge battery to "80% Limit" shouldn't just be for iPhone 15

#99
I recently had a battery fail pretty spectacularly in a Huawei 5G router, which had spent most of its short (3 years) life sitting charged to 100%. Admittedly the replacement battery was cheap, but the failed battery was a messy hassle to change since it had swollen up so much it almost blew the housing of the router apart. And potentially dangerous if it had split open or caught on fire.

If Huawei had a "limit charge" feature in this device, it would probably have avoided all that hassle!

Re: The iOS option to charge battery to "80% Limit" shouldn't just be for iPhone 15

#100
post #41

Earlier quoted context omitted.

I wish they made the batteries slightly larger, then made 100% on the battery meter secretly be 80% of the increased capacity so I could have my cake and eat it.

I'm pretty sure Samsung does a fake-out like this to display your 80% charge as 100. (Samsung.tablet at least)

The phones display 100% at like 98-99%.

The Android API allows you do get the voltage and current of the battery (with negative current for discharging and positive for charging), so there are apps out there that tell you the real state of the battery when it's in that range. The phones will tell the user fully charged before it's actually completely charged, but it's not much. It's mainly so if you leave it plugged in, it can cycle a bit up and down while still displaying 100% instead of continually trickle-charging.

My guess is tablets would be similar, but I've never had one.

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