Is it good to run all the way down the battery to calibrate?

[Branaghan]

My mother is using the iPhone 7 Plus with the last iOS 14.

Interesting to note that my iPAD Pro 10.5 probably used less than the iPhone has 83% of battery life. But it doesn't drain the battery so fast as her device.

I could be mistaken, yet I think both may benefit from a full discharge (to 0%) and then recharging to 100%.

Is this procedure really necessary for the 7+ and newer iPhones or should never be done, not even once?

If this is required at least once every X months, I need to know what follows.

I read some conflicting answers and the people that recommended this published a few articles YEARS AGO. So they all could be outdated and right now we know something else entirely.

Or it could apply to older devices such as this one, not new stuff.

Why you shouldn’t calibrate the battery in your iPhone, iPad, or iPod

Calibrating the battery in your iPhone, iPad, or iPod sounds like a good idea until you learn more about how lithium-ion batteries work.

appletoolbox.com

One more thing: is it possible to replace the battery for this iPhone without any issue, or we can't and have to buy a new phone? I am asking this because Apple devices have always scored close to 0 in terms of repairability. In other words, if something inside it's broken or worn out, Apple never fixes it and usually sends you a new device if the problem is recent. I had replaced a battery from an iPhone before, however it was older than this one (5).

If the battery is usually replaced then I guess this has to be done by someone that really knows what is doing, since it's hard to be able to do any change to devices that aren't designed with these scenarios in mind.

 

[chrfr]

It's not good for lithium-ion or lithium-polymer batteries to be run all the way down. "Calibrating" the battery really does nothing more than put unnecessary cycles on the battery.

 

[jetsam]

One more thing: is it possible to replace the battery for this iPhone without any issue, or we can't and have to buy a new phone?

With 1202 charge cycles and battery life reduced to 80%, the battery in the 7 Plus has done a fine job, and is now ready for replacement.

Assuming you're in the US, Apple will replace the battery in the 7 Plus for $49. You can bring it in to an Apple store, or send it in to Apple, using a box they will supply.

iPhone Battery Replacement - Apple Support

Need more power? An Apple Store or Authorized Service Provider near you can replace your iPhone battery. See the associated cost by coverage type.

support.apple.com

I wouldn't let anyone but Apple work on my iPhone.

 

[casperes1996]

It's not good for lithium-ion or lithium-polymer batteries to be run all the way down. "Calibrating" the battery really does nothing more than put unnecessary cycles on the battery.

With very rare exceptions like having changed the battery management chip on the logic board, this is correct and one should try and avoid getting to 0%; In fact, Apple never discharges to 0%. When it reaches 0% and shuts off automatically, there’s a “buffer” on the battery to avoid getting fully to 0% since that’s not great for the battery. The ideal is actually charging between 20% and 80% - For long term storage, keep it at like 60-80% charge in a well chilled (not frozen or anything) environment.

iPads batteries generally last longer than iPhones; Bigger batteries after all

 

[C DM]

It won't really have much of a noticeable negative effect if done once in a rare while, but it's not something that has been specifically recommended for some time now.