Battery

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Know thy battery 
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1) /sys/class/power_supply/BAT0/

cat or more the files for info

capacity : shows current battery percentage

capacity_level : See capacity level if its normal or not

energy_full : maximum possible energy. Difference between energy_full and energy_full_design shows the reduction of battery's capacity

energy_full_design : maximum possible energy per design 

energy_now : current energy

2)
upower -i $(upower -e | grep BAT) | grep --color=never -E "state|to\ full|to\ empty|percentage"

3)
sudo apt-get install acpi

acpi -V

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Improve your battery life - TLP
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1) Install TLP 

sudo add-apt-repository ppa:linrunner/tlp
sudo apt-get update
sudo apt-get install tlp tlp-rdw
sudo apt-get install tp-smapi-dkms acpi-call-dkms [ For thinkpads only ]

2) Start TLP

sudo tlp-start

3) See tlp stats

sudo tlp-stat

	-b [ battery]
	-c [