On Xbox Wire, the highlighted example for how default game profiles will work with ROG Xbox Ally handhelds is demonstrated with Hollow Knight: Silksong. By enacting the setting after the update, the metroidvania game should gain "nearly an hour of battery life compared to performance mode while still delivering smooth 120fps gameplay." Default game profiles are starting in preview with 40 titles available, including Call of Duty: Black Ops 7, Doom: The Dark Ages, and Halo: The Master Chief Collection.
Battery anxiety is the worst, and Battery Saver is a no-brainer feature that helps at just the right time. Standard Battery Saver steps in at the 20% mark, dims the interface, drops the screen refresh rate, and pauses some non-essential background data that might normally eat away at the battery over time. Calls, texts, and mapped navigation still break through, but almost everything else waits until you plug in again. It's an easy and effective solution.