The 13-inch rMBP features an integrated 74Wh, non-user-serviceable lithium polymer battery. The smaller chassis forced the use of a smaller battery compared to the 95Wh part used in the 15-inch
But I bought the MBP M1 Pro 14" a week ago and the battery came in between 98% and 99% capacity. It seems people are also commenting that the battery health is dropping rapidly. My Macbook Pro M1 13" 2021 has been used more plugged in and always with aldente. Activated July 15, 2021, has 5 cycles and 102% battery health.
Testing conducted by Apple in May 2022 using preproduction 13-inch MacBook Pro systems with Apple M2, 8-core CPU, 10-core GPU, 8GB of RAM, and 256GB SSD. The wireless web test measures battery life by wirelessly browsing 25 popular websites with display brightness set to 8 clicks from bottom.yFcs0X.