3

I think that the power adapter was probably first designed for the North American market. For that market, the design is not flawed.


2

IMHO, this choice is more an aesthetic rather than a functional. Also it offers a choice for a usb charger which is intented to be connected directly to a wall socket e.g. bedside (and not on a power strip). Both designs have pros and cons. Side end photo accidental knocking (+) Better (-) more exposused interferes with adjacent outlets (-) interferes ...


1

Lenovo ADL170NLC3A has an Energy Star V (ES 2.0) rating. Energy Star states to get that rating for nameplate output power ($P_{no}$) > 45W, the Minimum Average Efficiency in Active Mode ≥ 87%. At nominal conditions of 170W, 20V @ 8.5A, and a minimum efficiency of 87% implies 195W input. So worst case, the ac charger consumes 25W. The AC adapter is a ...


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