wattaire
Apple
40W
C
40W Dynamic Power Adapter (60W Max)
Apple · A3351
vs
Apple
70W
C
70W USB-C Power Adapter
Apple · A2743
The short version
Apple 40W Dynamic Power Adapter (60W Max) is 51% smaller by volume.
Apple does not publish how it divides power between ports, so a like-for-like comparison stops there.
Apple is the cheaper watt: 0.74 €/W against 1.13 €/W.
Size, true to scale
front and side, one scale
20
40
60
46×46×28 mm
59 cm³ · 80 g
65×65×29 mm
120 cm³ · weight not published

Solid block is the face you see in the socket; the outline next to it is depth.

Power by situation
bars share one scale · 70 W
One device, best port
60 W
70 W
What a laptop gets when nothing else is plugged in.
Two devices at once
not published
not published
The best published pair, which is rarely an even split.
Three devices at once
not enough ports
not enough ports
Everything plugged in together.

Port layouts differ, so we compare what you would do with the charger, not port pairs. Each row takes the best published combination for that situation.

Field by field
Apple
Apple
Total output
40 W
70 W
Ports
1×C
1×C
Volume
smaller is better
59 cm³
120 cm³
Weight
smaller is better
80 g
not published
Power density
0.68 W/cm³
0.58 W/cm³
PPS
No
No
EPR
over 100 W
No
No
Folding plug
Yes
Yes
Price per watt
net of VAT
0.95 €/W
0.62 €/W
Documentation
9.6/10
10.0/10

marks the better value in that row. Ties, missing data and class differences get no mark.

Offers
EUR · incl. 19% VAT
€45.00
Apple Store (DE)
See at retailer
€51.90
Geizhals
See at retailer