About this replacement
Designed for IBM devices. Compatible models include ThinkPad 390, ThinkPad 390E, ThinkPad 1720, ThinkPad 390X, ThinkPad i1700, ThinkPad i1720, ThinkPad i1721, ThinkPad i1750. Replacement part numbers include 02K6610, 02K6611, 05K6610, ASM 02K6535, FRU 02K6513, FRU 02K6520, FRU 11J8923. Key specifications: 11.1V, 4400mAh, Li-ion.