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My laptop will turn off way before the charge is at 0%. It started turning off at 20% but at this point it turns off at 90% charge. Normally the solution would be to buy another battery, but this is the replacement battery I bought after a similar issue arose with the original battery. Any clue what's going on? Is this an internal issue or did I just buy another bad battery? HP Notebook 15 running Ubuntu 18.04 if it helps.
