Whenever I plug my charger out, the lifespan of my battery suddenly drops from 90 minutes to 30. By "suddenly" I mean it literally takes it around 10-15 seconds at most to drop. My battery isn't new, but it isn't broken either (lasted 2-2.5 hours unplugged on Windows 8. Not much, I know, but it's not 30 minutes either)
I've been searching for answers for quite a while now (even the "possible answers" list had quite a few similar topics) but I did not seem to find a helpful answer. Maybe it's because I'm bad at searching, maybe it's because I'm still slightly freaking out.
Either way, your guidance would be very helpful.
Using 13.04, 64-bit.
PS.: I have Jupiter and Intel Graphic Drivers for Linux installed already.
PSS: upower dump :
Device: /org/freedesktop/UPower/devices/line_power_AC native-path: /sys/devices/LNXSYSTM:00/LNXSYBUS:00/ACPI0003:00/power_supply/AC power supply: yes updated: Mon Oct 7 19:33:49 2013 (497 seconds ago) has history: no has statistics: no line-power online: yes Device: /org/freedesktop/UPower/devices/battery_BAT0 native-path: /sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0A:00/power_supply/BAT0 vendor: Sanyo model: DELL 4YRJH13 serial: 7732 power supply: yes updated: Mon Oct 7 19:33:55 2013 (491 seconds ago) has history: yes has statistics: yes battery present: yes rechargeable: yes state: fully-charged energy: 48.6 Wh energy-empty: 0 Wh energy-full: 48.6 Wh energy-full-design: 48.6 Wh energy-rate: 0.0108 W voltage: 12.343 V percentage: 100% capacity: 56.2444% technology: lithium-ion Daemon: daemon-version: 0.9.20 can-suspend: yes can-hibernate: no on-battery: no on-low-battery: no lid-is-closed: no lid-is-present: yes is-docked: no