02K6524 - Ni-MH Battery IBM TPad i1400 and 1500 series. Also fits Acer Extensa 501, 502, 503 and 505 series. Compatible part numbers: 02K6526, 02K6524 or 02K6525. Please look up the bottom of your computer and find the "TYPE" no. If it starts with 2611-??? this is the right battery for your laptop. Does *not* replace 02K6576 or 02K6578! Battery technology: Ni-MH, 9.6 volts 3500 mAh