Xbox’s leaked Project Green Leaf targets better battery life on Windows handhelds

Windows handhelds may finally get some help with their biggest weakness: battery life. A new report says Microsoft is working on a leaked initiative called Project Green Leaf, designed to reduce power consumption on Windows-based gaming handhelds by integrating power-saving measures into the Xbox GDK.

According to the report, internal tests in some games have shown up to 30% power savings, with profiles that encourage developers to scale resolution or cap performance during low-detail moments such as menus and lobbies. This should be treated as a leak, not a confirmed public product rollout. Still, the idea makes sense. Steam Deck’s advantage has never been raw power alone; it is the tight relationship between hardware, operating system and performance tuning.

If Microsoft can make Windows handhelds more efficient without forcing every device maker to solve the same problem alone, it could make ROG Ally, Legion Go, MSI Claw and future Xbox-branded handheld-style devices much more practical.