It starts off with a 5V nominal voltage, but then can go as high as 20V at about 3A (≅ 61W). This chip is what negotiates the charging power to be delivered from the USB-C ( USB-PD compliant) power adapter. There have been reports that the USB Mux chip (TI CB3215) is faulty. This 'battery not charging' message is perfectly normal when this function/feature is enabled. With the release of Catalina (10.15.5), there is a feature called Battery Health Management that will actually stop the charging of the battery at a certain battery charge range.

There are a couple of possibilities that can be attributed to this: Battery Health Management When charging my MacBook Pro (mid 2017, macOS Catalina 10.15.7) with the 61W USB-C Power Adapter from Apple, sometimes the 'battery is not charging' warning start appearing from nowhere draining the battery. When using another power adapter on the macbook, it's charging slowly (but coming from a 12W power adapter and a USB-A to USB-C cable that seems fair enough). When using the power adapter from Apple and the USB-C cable on another device (unfortunately a phone and not another Macbook), it's charging normally. After the logic board and battery being replaced, the issue is still here.Ī full discharge, then a full charge didn't fix anything. The 'battery is not charging' issue start happening early this year, but the Macbook had another issue with the logic board as well. Why is this happening ? (Sometimes while the battery is full and still plugged, sometimes while charging)

When charging my Macbook Pro (13 inch, mid 2017, MacOS Catalina 10.15.7) with the 61W USB-C Power Adapter from Apple, sometimes the 'battery is not charging' warning start appearing from nowhere draining the battery (from every one of the 4 ports available).īy looking up the charging information (using Istat Menus) it appear that the Macbook think that the 60W charger is in fact a 12W one (and it appear that the intensity is negative i.e not charging):īy unplugging/plugging back the USB-C cable (sometimes several times) all comes back to normal

60w mac charger apple