Same issue after installing Big Sur 11.1. Battery was working well, I had no issues. But immediately after installing Big Sure 11.1 the battery Is not charging, showing 1% and service needed. MBP 2016, only 91 charging cycles. I had a long discussion and “support” with Apple support on phone (only way to get contact I have experienced) They were really trying their best, but... Their conclusion was that the battery was defect and that I have to get a new battery. No complaint accepted (although in Norway we actually do have a 5 years complaint period according to the Consumer Act). With the support we did “all” different start/reset and test procedures. A final test gave the status report code PPT006 (“confirming” that the battery is gone and this is not a software issue they claimed). They claimed that the battery has been defect before the installation, but that the Big Sure software detected that the battery is defect! Hello!, the battery, when working perfect just before the software update, was then immediately defect afterwards!! I find that illogical. My conclusion, also after reading all the other comments, it that this seems likely to be a software issue and not a hardware problem! Based on this, will replacing the battery solve the problem? Has anyone done that?