which apple products use my 65w portable power adapter, model a1021? .

What info would you like?

MacBooks, MacBook Pros, MacBook Airs.

Sorry, looking at your picture, it seems to be an older power adapter, so most likely for an iBook, or PowerBook.

G4 iBooks and G4 PowerBooks made from 2003 through 2005

Here you go:

"Where used:

PowerBook G4: PowerBook G4, PowerBook G4 (Gigabit Ethernet), PowerBook G4 (DVI), PowerBook G4 (1GHz/867MHz), PowerBook G4 (12-inch), PowerBook G4 (17-inch), PowerBook G4 (15-inch FW800), PowerBook G4 (12-inch DVI), PowerBook G4 (12-inch 1.33Ghz), PowerBook G4 (17-inch 1.33Ghz), PowerBook G4 (15-inch 1.5/1.33GHz), PowerBook G4 (17-inch 1.5Ghz), PowerBook G4 (12-inch 1.5Ghz), PowerBook G4 (15-inch 1.67/1.5Ghz), PowerBook G4 (15-inch Double-Layer SD), PowerBook G4 (17-inch 1.67Ghz), PowerBook G4 (17-inch Double-Layer SD), PowerBook G4 (12-Inch Double Layer SD)

iBook G4: iBook G4, iBook G4 (14-inch Early 2004), iBook G4 (14-inch Mid 2005), iBook G4 (14-inch), iBook G4 (Early 2004)

iBook G3: iBook (Late 2001), iBook (14.1 LCD 16 VRAM), iBook (14.1 LCD 32 VRAM), iBook (14.1 LCD 900 MHz 32 VRAM), iBook (14.1 LCD), iBook (16 VRAM), iBook (32 VRAM), iBook (800 MHz 32 VRAM), iBook (900 MHz 32 VRAM), iBook (Opaque 16 VRAM), iBook (Dual USB)

From this site: http://www.dvwarehouse.com/A1021---M8943---Apple-65W-AC-Adapter-for-PowerBook-G4 --iBook---New-p-26934.html

You're welcome.