The battery occupies a significant portion of the space, as evidenced by the Quest 3 teardown. - UploadVR

Quest 3 Teardown Reveals The Battery Takes Up A Huge Portion Of The Space

iFixit has conducted a teardown of Meta's new headset, the Quest 3, to examine its repairability and internal components. The Quest 3 features a slimmer visor and a larger battery compared to its predecessor, enabling a more powerful chipset and sensor suite. The teardown reveals that the battery occupies most of the internal space when the front plate is removed. Unlike other headsets, the Quest 3 does not distribute the weight of the battery away from the face. Additionally, iFixit discovered that the depth projector from the Quest 3 fits perfectly into the empty slot of the Quest Pro, indicating a design change made by Meta. iFixit gave the Quest 3 a low repairability score of 4/10 due to the lack of repair documentation, spare parts, and repair-focused design. To learn more about the teardown and explore the components of Meta's new headset, we recommend watching the full teardown video provided by iFixit.

Source: https://www.uploadvr.com/quest-3-teardown-battery/