You can look up such details before buying in https://psref.lenovo.com https://psref.lenovo.com. Then usually the hardware maintenance manual is available in su

You can look up such details before buying in https://psref.lenovo.com https://psref.lenovo.com. Then usually the hardware maintenance manual is available in support, that's the main reason why I end up getting their laptops, although their obnoxious wireless card whitelists (don't trust "compatible" FRUs BTW) make me always look elsewhere in the first place.