My own Airpods are just turning two years old next month and today after 47 minutes of pl;ayinga podcast they had 45% battery left... they work great but batteries don't last forever. So yes you can apparently get a "battery service" but when you can buy a cheaper set of earbuds for the cost one of Airpods' batteries you just have to toss up on the choice.
Out of warranty Airpods will cost about $69 per bud to replace the battery... cheaper earbuds could sell for $50 per pair new.
So just like with smartphones battery life becomes the Achilles heel of earbuds too...
More details at https://appleinsider.com/articles/19/03/11/heres-why-your-airpods-battery-life-is-getting-worse-and-what-you-can-do-about-it
#earpds Here's why your AirPods battery life is getting worse, and what you can do about it
If you got AirPods at launch in late 2016, you're likely now only able to listen to them for less than half the time you did without recharging. AppleInsider tells you what's going on, and what you can do about it.