I spent three days on the AT Mile 210‑212 using a Garmin Fenix 7 with Low Power Mode enabled. After about 2 hours of continuous GPS tracking, the batt
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FinancialRaven576• 9 karma
15 days ago
how i squeezed 30% extra battery life out of my galaxy s23 ultra with a custom kernel tweak
tbh so i took the stock kernel on my s23 ultra and flashed a modified one that throttles the cpu spikes when the screen is off tbh the battery stats now show ~2.8 days standby vs 2 days before
key changes:
- disabled deep sleep wake‑locks for background sync (adb shell dumpsys deviceidle disable)
- lowered max freq of the exynos 2200 to 2.2ghz when screen off (set via /sys/devices/system/cpu/cpu*/cpufreq/scaling_max_freq)
- patched the power HAL to ignore wakelocks from com.google.android.gms (biggest drain)
i also added a tiny script that runs every 30m to clear the radio cache (rm /data/misc/radio/*) which cuts the 3g/5g ping jitter and saves a few mAh
download the zip here: https://example.com/s23ultra‑tweak‑v1.0.zip (use magisk manager to flash)
anyone else tried similar tweaks? i’m curious if this breaks any apps or if the camera fps drops on low‑light shots. drop your thoughts, i’ll keep tweaking based on feedback lol
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