What command can I type to check the health of my HP Elite Book Battery in CentOS Linux?
Try
upower -i /org/freedesktop/UPower/devices/battery_BAT0
I get:
native-path: BAT0 vendor: ASUSTeK model: ASUS Battery power supply: yes updated: Wednesday 23 January 2019 10:36:38 PM IST (114 seconds ago) has history: yes has statistics: yes battery present: yes rechargeable: yes state: pending-charge warning-level: none energy: 57.349 Wh energy-empty: 0 Wh energy-full: 65.219 Wh energy-full-design: 74.228 Wh energy-rate: 1.432 W voltage: 15.4 V percentage: 100% capacity: 87.8631% technology: lithium-ion icon-name: 'battery-full-charging-symbolic'
See
https://www.cyberciti.biz/faq/linux-laptop-battery-status-temperature/
And
https://www.cyberciti.biz/faq/howto-check-health-of-laptop-battery/