Electronics: all comparisons

The wattage on the box is the least informative number in this category. All eight chargers in the 100W USB-C charger comparison carry the same label, yet seven have a single port, and the one multiport model gives no per-port split, so do not assume 100W survives when several ports are in use. One listing's 20V at 4.7A works out to about 94W. Check the wattage printed on your laptop's original charger, and remember that a cable not rated for 5A can hold the output below 100W. Whether a phone charger can run a laptop at all is answered in our piece on how to charge a laptop with a phone charger.

The Qi2 wireless charger comparison splits at 25W versus 15W: five list 25W, three stop at 15W. Speed only counts if your phone supports it, and two listings limit the iPhone 15 series and earlier to 15W, so a 25W model gives those phones no gain. Two chargers ship without a power adapter, and "MagSafe-compatible" is not the same as Qi2, since one 3-in-1 never states Qi2 certification.

In the surge-protected power strip comparison, joule ratings run from 200 J to 2,700 J and one strip lists none, so read that line first. Outlet count is not capacity: the 18-outlet strip and a 6-outlet one share the same 15 A rating. USB ports share output as well, with one strip's three ports sharing a stated 15W maximum. Three of the eight name no safety certification.