[NAME] , they pointed me to this one: Dell 240-Watt AC Adapter with 6feet Power Cord, which is the larger, older-style PS, but lists the M series as compatible and is $30 cheaper.   That'll work for underneath the desk and I'll keep the slimmer one that comes with it for the bag. Imkdd
Hi, I'm purchasing an x15 R2 and need an extra power supply for it. It comes with 240W supply PN  450-ALJS, but it's not listed on the Accessories page. The 240W listed is Dell Slim Power Adapter - 240-Watt 7.4mm with 1 Meter Power Cord, PN 450-AHHE, but the x series isn't on the Compatibility list. Can anyone confirm if this is compatible? Thanks, imkdd  
x15 R2, power supply