Here are ten potential ways to fix an AirPod that dies faster than the other:

1. Check the battery level: Make sure that the AirPod with the shorter battery life is actually running out of power faster than the other. You can check the battery level of each AirPod by opening the charging case near your iPhone, iPad, or iPod touch and looking at the battery level indicator.
2. Clean the AirPods: If the AirPods are dirty or covered in debris, this could cause them to drain the battery faster. Try cleaning the AirPods with a soft, dry cloth, or using a toothbrush to gently brush away any dirt or debris.
3. Reset the AirPods: If the AirPods are not functioning correctly, resetting them may help to fix the problem. To reset the AirPods, follow these steps:

• Place both AirPods in the charging case.
• Close the lid.
• Press and hold the setup button on the back of the case for at least 15 seconds, until the status light starts flashing amber.
• Open the lid and then press and hold the setup button again until the status light flashes white.

4. Check for updates: Make sure that you have the latest version of iOS on your device, and that your AirPods are up to date. To check for updates, go to the “Settings” app on your device, tap “General,” and then tap “Software Update.”1. Open the Settings app on your iPhone.

   2. Tap Bluetooth.

   3. Find the AirPods and tap the i on the right.

   4. In the About section, check Version – that’s the current firmware version you’re on.

   5. Check the Apple support page for the latest AirPods firmware version that your earbuds need to have.

   6. If your AirPods need an update, put them in their charging case, start charging them (either with a Lightning cable or wirelessly), and place them next to your iPhone.

   Now your AirPods should update after a short while, and you can check if both are discharing at the same rate or not.

5. Use the AirPods with only one device: If you are using the AirPods with multiple devices, try using them with just one device to see if that helps to fix the problem.
6. Check the charging case: Make sure that the charging case is working correctly and that the charging port is clean. If the charging case is damaged or not functioning properly, it could be causing the AirPods to drain the battery faster.
7. Check the AirPod settings: If you have changed any settings on the AirPods, such as the volume or microphone sensitivity, this could be affecting the battery life. Try resetting the settings to the default values to see if that helps.Here’s how to adjust your AirPods settings.

   1. Begin by wearing your AirPods.

   2. Open the Settings app on your iPhone.

   3. Tap Bluetooth.

   

   4. Find the AirPods and tap the i on the right.

   5. Then adjust the Left and Right functions in the Double-Tap On AirPod section.

   

8. Check for water damage: If the AirPods have been exposed to water, this could be causing the battery to drain faster. Try letting the AirPods dry out completely before using them again.
9. Check for software conflicts: If you have installed any third-party software or apps that could be causing conflicts with the AirPods, try uninstalling these and see if that helps to fix the problem.
10. Contact Apple support: If none of the above solutions work, you may want to contact Apple support for further assistance. They may be able to help diagnose the problem and provide additional solutions.
11. The AirPods case is damaged on one sideIt could be that the AirPod that dies faster is completely fine, but it just isn’t getting enough charge because its side of the charging case is damaged. Again, all you have to do is get in touch with Apple support and schedule a repair or replacement.
12. The AirPods might benefit from being fully drained and then rechargedIt’s a good idea to get into the habit of charging your AirPods before they completely drain because this will generally extend their battery life. However, if you have one AirPod that regularly dies before the other, you might want to “hack” the battery of both earbuds by completely draining them, and then giving them a full recharge.

References: 

1- https://www.businessinsider.com/guides/tech/why-does-one-airpod-die-faster

Smartphone 101 – Pick a smartphone for me – android or iOS – Apple iPhone or Samsung Galaxy or Huawei or Xaomi or Google Pixel

How AI is Impacting Smartphone Longevity – Best Smartphones 2023