Recalibrating laptop batteries - READ FOR HP MACHINES

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(HP Legacy BIOS) 15% lockout bypass

DO NOT apply these settings to your primary OS. They may damage the battery.
Boot the laptop into a live Linux Mint Cinnamon session. Open Settings and make the following changes:
Open Power Management. Change When the battery is critically low to Do nothing.
Use the laptop until it shuts down. Everything from this session will be lost.

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