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<blockquote data-quote="lclev" data-source="post: 1853112" data-attributes="member: 307555">Update - The battery health feature was not the issue.&nbsp;&nbsp; I have discovered that there is a known issue dealing with USB 2.0 and hubs.&nbsp; This is an issue on MacBook Pro's and MacBook Air's 2020 and even some 2018 &amp; 2019 models.&nbsp; For some reason when a hub is attached the symptoms I described occur.&nbsp; The weird thing is disconnection the USB hub still leaves it listed in System Report -&gt; USB and this causes issues with the keyboard and mouse.&nbsp; Various suggestions are given - one involve buying a CalDigit USB-C Pro Dock hub that cost $200 - um, NO.&nbsp; Several people have returned their 2020's and found the issue persist on the new one too.&nbsp; The only time I have used a USB-C hub was to attach a USB 2.0 device and do a CC backup.&nbsp; I have also used the hub to run an HDMI monitor but that seems to not cause issues according to what I have read and I had none.So what I am planning it to use a USB-C drive to do my CC backups.&nbsp; That should not cause issues.&nbsp; Hopefully Apple will come up with a fix.&nbsp; I have a feeling the T2 chip could be involved but I can't substantiate that other than my intuition.&nbsp; It really runs very well and since the USB hub is no longer listed in system report I haven't had issues.&nbsp; Lisa</blockquote>

[QUOTE="lclev, post: 1853112, member: 307555"] Update - The battery health feature was not the issue. I have discovered that there is a known issue dealing with USB 2.0 and hubs. This is an issue on MacBook Pro's and MacBook Air's 2020 and even some 2018 & 2019 models. For some reason when a hub is attached the symptoms I described occur. The weird thing is disconnection the USB hub still leaves it listed in System Report -> USB and this causes issues with the keyboard and mouse. Various suggestions are given - one involve buying a CalDigit USB-C Pro Dock hub that cost $200 - um, NO. Several people have returned their 2020's and found the issue persist on the new one too. The only time I have used a USB-C hub was to attach a USB 2.0 device and do a CC backup. I have also used the hub to run an HDMI monitor but that seems to not cause issues according to what I have read and I had none. So what I am planning it to use a USB-C drive to do my CC backups. That should not cause issues. Hopefully Apple will come up with a fix. I have a feeling the T2 chip could be involved but I can't substantiate that other than my intuition. It really runs very well and since the USB hub is no longer listed in system report I haven't had issues. Lisa [/QUOTE]

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