What is the constant input voltage [V] that needs to be applied at the DCIN socket by a power supply, and the input voltage range tolerated by the Librem system?
What is the maximum load current [A] that a power supply should be capable of sustaining through the DCIN socket?
What is the nominal electric power [W] consumed by the Librem system with no peripheral devices attached? How does the electric power vary per different operation modes?
modes
running on battery alone
sleeping on battery alone
running on power supply while charging the battery
sleeping on power supply while charging the battery
running on power supply with full battery charge level
sleeping on power supply with full battery charge level
turned off while charging the battery through power supply
turned off while maintaining the full battery charge level through power supply
I haven’t owned this laptop. But I can’t imagine it to be totally different from other models. For the components my guess is as following. I can’t imagine it to be a lot different than that.
The battery has 45w/h and 2 cells (7.4V). Taking into account fast charging with 1C (45w) and max load of 35w (which will drop anyway to ~25 after a short time period) a 80w power supply should do the job perfectly. I believe even a 60w power supply should not hinder in any way.
My guess is that the internal voltage regulator works with 12+V. So anything from 14-20V should be fine. Amperes would be 3A (20V) 4.3A (14V).
With ThinkPads I have experienced that the voltage Input is quite flexible (nominal 20V, but works with 15-23V)