Model No HP ENVY 4-1000 (EL04 IB3R) Number Of Cells 4 Cell Capacity 2000 mAh Compatible Models HP Envy 4-1000 Envy 4-1100 Envy 4-1200 HP 4-1000 4-1100 4-1200 4-1043CL HSTNN-IB3R 681879-1C1 681949-001 HSTNN-UB3R 681879-171 681879-54 Compatible Parts No EL04, IB3R Warranty 1 Year From Service Center