How to extend laptop battery life? TLP and auto-cpufreq didn’t work

I’m having an issue with my laptop battery draining too quickly. I tried optimizing power consumption by installing **auto-cpufreq** using the --install command as per a guide I found. However, I haven’t noticed any difference in battery life—it still drains just as fast, even when I’m just coding in an IDE or browsing in Firefox. First of all, I also tried tlp, but it doesn't help either. - Could the issue be with the battery itself (e.g., wear and tear)? How can I check - What other power optimization methods can I - Could Firefox or my IDE (e.g., VS Code) be causing the rapid drain? How can I check this? - Are there any alternatives to auto-cpufreq that might help? **My Setup:** **OS**: - Debian GNU/Linux 12 bookworm (x86-64) **Inteface**: - Cinnamon Version 5.6.8 **Processor**: - 11th Gen Intel© Core™ i5-1135G7 @ 2.40GHz × 4 I bought my laptop 2 years ago. Results of command: upower -i $(upower -e | grep BAT) | grep -E 'energy-full|capacity'

energy-full:         28.8827 Wh
    energy-full-design:  37.037 Wh
    capacity:            77.9834%