Yes, Apple will honor your warranty even if the AirPods were purchased from an authorized retailer like Amazon. The limited warranty (and AppleCare) follows the device, not the store. Here are the steps to resolve this and how the replacement process works:
1. Troubleshooting first — Before visiting the store, use a Q-tip with a tiny amount of isopropyl alcohol to clean the metal charging contacts at the bottom of the left AirPod and inside the charging case. Debris often causes intermittent charging failures.
2. Factory Reset — Put both AirPods in the case, open the lid, and hold the button on the back for 15 seconds until the light flashes amber then white. This clears any firmware-based charging logic errors.
3. Apple Store Policy — Apple usually replaces only the defective component. If the left AirPod is failing their diagnostic test, they will give you a brand-new left AirPod, not an entire new set (case and both pods), unless the case itself is found to be the cause of the failure.
4. Bring your Proof of Purchase — While Apple can usually see the warranty status via the serial number, having your Amazon invoice (digital or print) is helpful if there is a discrepancy in the purchase date listed in their system.
5. Book a Genius Bar Appointment — Go to support.apple.com to schedule an appointment. Walking in without one often results in long wait times.
6. Cost — Since you are within the 1-year limited warranty, the replacement for a defective (non-accidental) charging issue is $0.
As long as there is no clear physical or liquid damage to the AirPod, you should have no problem getting it replaced under warranty.
Hope this gets your left AirPod charging perfectly again!