Models that these upgrades will work for:

HP-Compaq Pavilion notebook dv4201TX (EH015PA), HP-Compaq Pavilion notebook dv4205TU (EQ552PA), HP-Compaq Pavilion notebook dv4205TX (EH017PA), HP-Compaq Pavilion notebook dv4206TX (EH018PA), HP-Compaq Pavilion notebook dv4207EA (EK980EA), HP-Compaq Pavilion notebook dv4208TX (EH039PA), HP-Compaq Pavilion notebook dv4209TX (EH040PA), HP-Compaq Pavilion notebook DV4210TX, HP-Compaq Pavilion notebook DV4211TX, HP-Compaq Pavilion notebook DV4213AP, HP-Compaq Pavilion notebook DV4215AP, HP-Compaq Pavilion notebook DV4220TX, HP-Compaq Pavilion notebook DV4223CL, HP-Compaq Pavilion notebook DV4224TX, HP-Compaq Pavilion notebook DV4225EA, HP-Compaq Pavilion notebook DV4225TX (DDR2-400MHz), HP-Compaq Pavilion notebook DV4225TX (DDR2-533MHz), HP-Compaq Pavilion notebook DV4230US (DDR2-400MHz), HP-Compaq Pavilion notebook DV4230US (DDR2-533MHz), HP-Compaq Pavilion notebook DV4234EA (DDR2-400MHz), HP-Compaq Pavilion notebook DV4234EA (DDR2-533MHz), HP-Compaq Pavilion notebook DV4246EA (DDR2-400MHz), HP-Compaq Pavilion notebook DV4246EA (DDR2-533MHz), HP-Compaq Pavilion notebook DV4250US (DDR2-400MHz), HP-Compaq Pavilion notebook DV4250US (DDR2-533MHz), HP-Compaq Pavilion notebook DV4257US, HP-Compaq Pavilion notebook DV4269US (DDR2-400MHz), HP-Compaq Pavilion notebook DV4269US (DDR2-533MHz), HP-Compaq Pavilion notebook DV4270US (DDR2-400MHz), HP-Compaq Pavilion notebook DV4270US (DDR2-533MHz), HP-Compaq Pavilion notebook DV4272US, HP-Compaq Pavilion notebook DV4273EA (DDR2-400MHz), HP-Compaq Pavilion notebook DV4273EA (DDR2-533MHz), HP-Compaq Pavilion notebook DV4275NR, HP-Compaq Pavilion notebook DV4288EA (DDR2-400MHz), HP-Compaq Pavilion notebook DV4288EA (DDR2-533MHz), HP-Compaq Pavilion notebook DV4290EA (DDR2-400MHz), HP-Compaq Pavilion notebook DV4290EA (DDR2-533MHz), HP-Compaq Pavilion notebook DV4291EA, HP-Compaq Pavilion notebook DV4295EA (DDR2-400MHz), HP-Compaq Pavilion notebook DV4295EA (DDR2-533MHz)