They still down clock when removed though - my battery had swollen to the point where it no longer sat flat on the desk and the trackpad wouldn't click so I dismantled and took it out, then I was stuck at 800 MHz CPU (2 GHz normally). Fitting a new battery restored performance.Joe_H wrote:P.S. The battery is integrated into the MacBooks and MacBook Pros sold the last 5 years, so statements about dropping to half speed does not apply to those models.
In general, laptop thermals aren't great for 24/7 folding - I'm pretty sure the heat accelerated the demise of the battery and it was always noisy with fans at full blast.