It would be to deny the greatest not to agree when we talk about the success of the AirPods, you just have to take a "walk" through public transport in big cities to meet dozens of users, who if they do not use AirPods, are using an identical copy, which in turn also becomes a sign of success.
For this reason Apple knows that AirPods are still a young and moldable product to continue squeezing its benefits. Apple could change the interior of the AirPods to adopt SiP technology and thus allow more space for the battery.
This time it was the team of DigiTimes who has shared leaked information about the development of the new AirPods. We have recently received a renovation of them that have not meant a change in design but the addition of certain features, such as wireless charging. Apparently, These AirPods would hit the market at the end of this year 2019, something that does not have much logic taking into account that the second generation AirPods have been launched less than a quarter ago, so I personally do not see it convenient to give much veracity to this planned launch date.
These third-generation AirPods will have inside a manufacturing system in accordance with SiP (System in Package) technology, combining a rigid and flexible plate according to the needs of the design, integrating more circuits in a single chip, which would help to significantly reduce the space occupied by these internal components and above all reducing the complexity of manufacturing of the AirPods, its main drawback today. Meanwhile, the AirPods are destined to continue to rise in price and continue to sell "like hotcakes", in fact I think that not even Apple would have predicted such a success.