HP 805291-001 - Battery pack (Primary) - 4-cell lithium-ion (Li-Ion), 3.0Ah, 40Wh (RO04040XL-CL) Retail
HP 685989-001 - HD04XL 4-Cell Primary Battery for HP Spectre XT Ultrabook 13-2000 Series Sale $69.00 Retail $89.00