In recent years, the popularity of wireless headphones has only grown. For Apple tech lovers, it all started with the first-generation AirPods , continued with AirPods with wireless charging support , and now evolved to the level of AirPods Pro . The main disadvantage of such gadgets is the battery. It's not even about the limited operating time between recharges, but about the rapid degradation of the battery itself. If a smartphone confidently withstands 2-3 years of active operation and at the same time continues to work for at least half a working day, then with headphones, everything is much worse. The same AirPods usually withstand a year and a half of average or a year of active use, after which, instead of the declared five hours of autonomy, the user gets 1.5-2 hours maximum. At the same time, the case is not able to charge the “ears” more than 2-3 times and often asks for an outlet on its own. Now let's figure out how to accurately determine the level of battery wear of each of the headphones and the charging case itself.