Replacement Laptop Battery for HP 550,COMPAQ 510, 511, 610,HP COMPAQ Business Notebook 6720s, 6720s/CT, 6730s, 6730s/CT, 6735s, 6820s, 6830s, 10.80V,4800mAh,Li-ion
Specifications: [Voltage(V)] 10.8 [Capacity(mAh)] 4400mAh/48WHr [Cell] 6 [Color] Black [Type] Lithium-Ion Compatible Part Numbers: HSTNN-IB62, 451085-141, 451086-121, 451086-161 451568-001, GJ655AA, HSTNN-IB51, HSTNN-IB52 Fit Machine Models: Business Notebook 6720s, Business Notebook 6720s/CT, Business Notebook 6730s Business Notebook 6730s/CT, Business Notebook 735s, Business Notebook 6820s, Business Notebook 6830s