The Mi 9 has a decent DAC, but 4PDA users have unlocked it.

Mi 9 batteries are old now. 4PDA doesn't believe in "battery health" apps. They use the method.

For Xiaomi Mi 9 owners, serves as the definitive central hub for technical support, custom development, and community-driven troubleshooting. The Mi 9 (codename: cepheus ) has one of the most active legacy communities on the platform due to its status as a former "flagship killer." Core Sections on 4PDA for Mi 9

Here is why the section is still thriving in 2025/2026.