You know that is a massive shock to the battery, right?
Nah. For lead and NiCd, that’s still somewhat true. However, any (respectable) modern charging system and battery has a fair amount of safeguards
Learn why Apple rechargeable lithium-based technology provides the best performance for your iPhone, iPad, iPod, and MacBook.
www.apple.com
Additionally, when an iPhone, iPad, MacBook, etc battery reaches zero state of charge, it’s quite a bit from fully discharged, super low voltage. Beyond lessening the likelihood of actual deep discharge, the extra, hidden margin is to extend features such as Find My and to show status indicators (e.g., display the low battery and connect to charger icons).
Just like the 80% battery cutoff, whether state of charge (i.e., charging up to) or state of health (i.e., “should” be replaced if below/less) is arbitrary. There’s fact behind it but it’s not absolute and simply a reasonable compromise — that is, a batteries most comfortable state is hovering around 50% charge but it would be unrealistic/unfeasible to use only a small fraction of a battery’s capacity, for example, 40 - 60% charge. Oh… And furthermore, the “calibration is harmful to a battery” ‘urban myth’. In fact, (re)calibration is still very much useful.
If you have Charge Limit set to less than 100 percent, your iPhone will occasionally charge to 100 percent to maintain accurate battery state-of-charge estimates.
To improve the lifespan of your battery, your iPhone learns from your daily charging habits.
support.apple.com
All newly-installed smart batteries should be calibrated as soon as possible. This helps your phone or laptop get an accurate reading on the battery’s state of charge.
www.ifixit.com
Where did you learn this?
The behavior primarily stems from my
OCPD, that is, it feels wrong to stop or start charging at some arbitrary or otherwise seemingly random percentage. Although, there’s nothing entirely wrong with connecting and disconnecting a device from a charger whenever it’s convenient. But learning the previous paragraph items has helped reinforce how not harmful/problematic the action is.
I've been taught to never, ever do it that way, unless absolutely necessary.
There are only a few things you need to know and do:
•
Avoid high ambient temperature:
Your device is designed to perform well in a wide range of ambient temperatures, with 62° to 72° F (16° to 22° C) as the ideal comfort zone. It’s especially important to avoid exposing your device to ambient temperatures higher than 95° F (35° C), which can permanently damage battery capacity. That is, your battery won’t power your device as long on a given charge. Charging the device in high ambient temperatures can damage it further. Software may limit charging above 80% when the recommended battery temperatures are exceeded. Even storing a battery in a hot environment can damage it irreversibly. When using your device in a very cold environment, you may notice a decrease in battery life, but this condition is temporary. Once the battery’s temperature returns to its normal operating range, its performance will return to normal as well.
— The device can manage temperatures fairly well except when the ambient is above a recommended or required level. It’s not as if an iPhone has a refrigerant system.
• Exercise (i.e., use) the battery, whether that’s charging or discharging. Don’t let it sit (i.e., be static) at the edge of charge range for a long period of time.
— Age is going to degrade the battery nonetheless. So, not using it is nearly worthless.
— If you don’t want to rely on Apple’s Battery Optimize feature, set the battery charge to 50% when the device is connected to a charger for an extended/lengthy period of time with a utility such
AlDente.
• Routine recalibration (as mentioned earlier).
