"Hey Siri" support and possibly wireless charging case alongside AirPower charging mat.
AirPods and AirPower: Everything We Know
AirPods Teardown Reveals Charging Case May Have Been Cause of Delay
Starting with the AirPods, iFixit separated the speaker portion of the pod from the rest of the device, comparing the tightly-packed internals to the Apple Watch teardown. Further investigating uncovered a miniature coaxial cable and two IR proximity sensors, which allow the AirPods to detect whenever they're inside an ear, and play/pause music accordingly.
Blocked by more glue and cables in the speaker portion of the AirPods, iFixit turned to the "stem" only to find "a waterfall of glue" inside the base section of the device. Just behind the metallic bottom area of each AirPod -- which provides the contact point for charging in the case -- the site uncovered the end of the battery cable underneath the wall of adhesive.
That shiny metal cap provides contact points for charging the AirPod, and surrounds the primary microphone. Hidden behind and within the torrent of glue, we spy the end of the battery cable.Cutting open the AirPods completely, iFixit eventually separated the antenna from the battery, theorizing that the "hanging boom is for more than just balance—it's also to improve reception." The earpiece of each AirPod is a 93 milliwatt hour battery, "equivalent to a little over 1% of the charge capacity in an iPhone 7."
If jamming complex components into a small form factor and sealing it with a copious amount of glue were a game, Apple would be winning.
Although the site could extract some basic components of the charging case without total destruction -- including the status LED -- it eventually had to resort to using a rotary saw in order to get behind the "impenetrable" shell. Discovered underneath was the case's battery, a 1.52 watt hour lithium-polymer cell that's around 16 times the power capacity of a single AirPod. iFixit equates this to around eight full recharges of the AirPods within the charging case.
iFixit took a few x-ray shots of the charging case's internals, and found "quality issues" within the chip's solder joints. A few empty spaces can be seen, referred to as "voiding," which iFixit said "could be evidence of low quality standards, or a rushed product release." This suggests that the source of the AirPods' delay was with the charging case and not with the AirPods.
The repairability score of the AirPods was ultimately rated at a lowest-possible 0/10, thanks to the copious use of glue as a fastener within most of the components of the AirPods, and the case's resistant outer shell.
Check out the rest of iFixit's teardown to see more internal exploration of the charging case's sync button, lightning connector, and a few more x-ray images of both the case and the AirPods.