You don't need to keep your iPhone or other devices from getting below 40 or 20 percent, you won't hurt them if you run them down until the device powers itself off. You can charge it every night, even if only at 90%.
Battery life depends on device settings, environment, usage, and many other factors. Testing conducted by Apple in February 2019 using preproduction AirPods (2nd generation), Charging Case, and Wireless Charging Case units and software paired with iPhone XS Max units and prerelease software. Volume was set to 50%.
It indicates the ability to send an email. Apple's AirPods held a strong lead over rivals in the fourth quarter of 2019 and over the course of the whole year, according to new data from Counterpoint Research. Apple's AirPods claimed 47% of the global market for truly wireless earbuds in 2019, according to the report.
If the AirPods case is completely dead, then the AirPods will not turn off when you put them back in the case. They will just stay on even when inside the case with the lid closed. The earpieces will start discharging once the case drops to 0%.
When purchasing AirPods or AirPods Pro via the online Apple Store, selecting "Customize it for free" will bring up the option to engrave the product. There, a user can choose to engrave the case with either text or an emoji, but not both.
The MagSafe Charging Case for AirPods Pro and the Wireless Charging Case for AirPods Pro are not waterproof or water resistant, so be careful not to get moisture in any openings. If your case comes in contact with liquid, dry it by placing it upside down with the lid open.
To charge your case via wired connection, plug the Lightning cable that came with your AirPods into the Lightning connector on your case. You can use a USB-C to Lightning Cable or a USB to Lightning Cable. Then plug the other end of the cable into a USB charger or port.
How to Find an AirPods Case:
AirPods use Bluetooth to pair with a Mac, which means you need to open the Bluetooth menu to check the battery level. To do so, click the Bluetooth icon in the menu bar, then hover the cursor over your AirPods to reveal the battery percentages. If you don't see this icon, head to System Preferences > Bluetooth instead.
Based on the survey, 40 percent of iPhone owners in the US own Bluetooth earbuds, with AirPods accounting for more than half of them. However, where Apple falls short is in the PC and smart speaker categories.
If you wash the AirPods with the case and you end up having to replace them, an AppleCare+ subscription will get you a replacement earbud and the case for $29. So, get AppleCare+ for all your Apple devices, including the AirPods. Keep in mind that you must sign up for AppleCare+ within 60 days of purchase.
Cases dry best when the lid is open and they are stored upside down. Before using your AirPods again or storing them away in their charging case, they must be completely dry, Apple warns. Putting wet AirPods into a charging case could cause further damage to the case itself.
So if (and when) you lose your AirPod Charging Case, Apple replaces your lost item for a fee of $59-99 USD. That AirPod case replacement is either new or equivalent to new in both performance and reliability. If you live near an Apple Store, call the Store to see if they offer AirPods case replacements.
When you put your AirPods in a different charging case, your iPhone won't recognize them when you try to use them unless you put them back in the old case first. In fact, they'll be connected to the other person's iPhone.
Conclusion. While you can charge AirPods with the case open, you should ultimately keep it closed whenever possible as there is a risk of loss, damage, and dirt that comes with the case being open. Charging AirPods is as easy as just putting them in their case.