​I have a 15 - inch Retina MacBook Pro from the mid - 2014 model. Here is the link: [url]https://www.badcaps.net/forum/showthread.php?t=66773&highlight=820-3662[/url] . The battery broke some time ago. After I removed the battery and plugged in the original power adapter, the MBP could boot up normally. However, when I checked with IntelPowerGadget, I found that the CPU speed was limited to 0.8 GHz, and it ran very slowly. Later, I found a solution on GitHub. There is an open - source project called cputune that can set the CPU running speed. So I can now run the MBP at full speed. But...

I am a software engineer and I have been engaged in this job for 20 years. I am from China. Hardware is not my area of expertise. However, I have a MacBook Pro and its battery is broken. After removing the battery, the original power adapter doesn't have enough power. When the MacBook Pro runs at full speed, it will cut off the power and restart. So I want to directly weld a high-power external power supply to the motherboard, and that's why I'm here.