Most of the newer small units now use a modified sine wave - not quite a true sinusoidal oscilliscope pattern, but not as blocky as the square wave - more of a clipped, flat-top sine wave. I haven't tried mine on a laptop yet, but it runs an electric drill, fridge, compressor, battery charger, etc. just fine.

Frank


'89 [color:"white"]G-Raider[color:"white"] [color:"black"]Supercharged 3.0L, MegaSquirt 2, lockup A/T, 2.5" exhaust, 172k, Cibie H4s/Oscar SCs, Hella Micro DE fogs, Cobra CB, Superwinch hubs, LSD rear/Aussie Locker front, Bilsteins, Lifeline AGM, Rust-Oleum