How to replace the Touch Bar

The easiest way is just replacing the uppercase assembly as replacing the panel alone is quite hard. This is the bare part MacBook Pro 15" Retina (Mid 2018-2019) Upper Case and here's the version with the battery MacBook Pro 15" Retina (Mid 2018-2019) Upper Case Assembly

Install this gem of an App to check your batteries heath CoconutBattery take a snapshot of the Apps main window posting it here so we can see it too.

To help you see the cost of adding a fresh battery alone MacBook Pro Battery. Reusing batteries is risky! Li Ion batteries are setup as two plates with an electrolytic between rolled up in a sizable with about 75 layers. The gap between the plates must stay at a distance otherwise the battery shorts out which creates a runaway thermal event sending the system a hot mess! This series is not easy to pull the battery without hurting the battery.

Sorry we don't have a guide for this series to replace the TouchBar or the upper case. We do have a guide to replace the battery which is more common a task MacBook Pro 15" Touch Bar 2018 バッテリーの交換方法. Take a look at the other series guides to get an idea on what's needed.