The only ones reasonably comparable I have found were the Acer Spin 5 for the i5 version and the Huawei Matebook X Pro 2021 for the less expensive i7. Although the Acer has a touchscreen (so it should theoretically be a bit worse on battery life), the review I read suggested that 15h of battery life were feasible. 10,5 hours were reported for the Huawei (different reviewer and higher resolution screen, so not a perfect comparison to the Acer or the Framework). I guess the “true”/average battery life for the Framework is somewhere between those two numbers, although of course heavily dependant on your usage and power profile.
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