A321 Captain reported being notified by a flight attendant of a temporary faint electrical odor in the aft cabin and galley area during initial approach. The flight crew continued to a safe landing.

Narrative

We had a smoke; odor & fumes event.This was not a A320 dirty socks event... on approach about 6;000 AGL I was notified of a faint electrical cord burning smell in aft cabin/galley area. I told the FA's (Flight Attendants) to keep me informed if it got worse and we would land in a few minutes.I was told upon arrival at the gate the FA's speculated it was probably smell from a passengers older laptop (FA's said faint electrical burn smell in back of aircraft that went away fairly fast). I speculated it was possibly pollution smell as we were on descent well below 10;000 ft.The FA's did report that they turned off the passenger charging ports when they detected the smell I noted this in the Aircraft Maintenance Logbook entry and report.No passengers or crew reported ill effects.Dispatch notified; Aircraft Maintenance Logbook entry made; Smoke; Odor & Fumes form completed; and conference call with Maintenance Operations Center and [Checklist] completed upon arrival per Flight Operations Manual.