Good Time&reg;New Battery for HP ProBook 4436s 4440s 4441s 4530s 4535s 4540s 4545s XB2T PR06 Brand New HP Battery Type: 6 Cell 10.8V,5200mAh Lithium-Ion Battery Product Type: Replacement Battery || Condition: New, 1 year warranty! ||No. of cell: 6 Please ensure the product(s) that you are going to buy fits the brand, model and part number of your device.