I have a bunch of Dell GN752 extended life batts. Most are still in box and plastic. Compatible Notebook Models: Latitude: E6400, E6400 ATG, E6400 XFR, E6500 Precision: M2400, M4400. Dunno if others. Dell Part Numbers: RK547, 312-0747, GN752
And a bunch of Dell M5Y0X that are still in taped plastic.
Compatible Part Numbers:04NW9, 05G67C, 312-1163, 312-1311, 451-11694, 8858X, 8P3YX, 911MD, HCJWT, KJ321, M5Y0X, P8TC7, P9TJ0, PRRRF, T54F3, T54FJ, YKF0M
They are supposed to be compatible with: Dell Inspiron 15R (5520), Dell Inspiron 15R (7520), Dell Inspiron 17R (5720), Dell Inspiron 17R (7720), Dell Latitude E5420, Dell Latitude E5420 ATG, Dell Latitude E5420m, Dell Latitude E5430, Dell Latitude E5520, Dell Latitude E5520m, Dell Latitude E5530, Dell Latitude E6420, Dell Latitude E6420 ATG, Dell Latitude E6420 XFR, Dell Latitude E6430, Dell Latitude E6430 ATG, Dell Latitude E6520, Dell Latitude E6530, Dell Vostro 3460, Dell Vostro 3560
Also PRO1X docking stations 3 each used. Think I have a few of the stands that these sit into and places the monitor above the laptop. I usually toss that part, but I'll check the shed.
And a BUNCH of different dell power units. BTW Some Dell and HP are interchangeable.