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  • Download and run Lenovo System Update. Update all Drivers and BIOS and restart. . No issue here with two X1 machines - one 1 year old and one 6 years old with a new battery half way through. Also contact Lenovo Support
    – anon
    Commented Feb 1, 2023 at 1:42
  • I have got all new drivers and BIOS.
    – Kamil
    Commented Feb 1, 2023 at 2:05
  • Talk to Lenovo Support. I have been using ThinkPads for several decades and they do not slow down on a good battery.
    – anon
    Commented Feb 1, 2023 at 2:09
  • Is the battery original and recognized as original?
    – gronostaj
    Commented Feb 1, 2023 at 5:58
  • @gronostaj yes, it is original battery, pretty old (2018) but still holds 90% because I take very good care of this battery. For most of the time I'm charging to 75% when I don't need full capacity, I do not expose it to low and high temperatures etc.
    – Kamil
    Commented Feb 1, 2023 at 14:34