Replace Rechargeable Li-on Laptop Batteries Specification Battery type: Li-lon Item No.: HPCQ321-6 Voltage: 10.8v Capacity: 4400mAh/5200mAh Color: Black Product Type: Replace battery Warranty: 12 months warranty Condition: Brand New!! Label model NO. HSTNN-CB1A/HSTNN-IB1A/HSTNN-LB1A/ HSTNN-UB1A/HSTNN-CB18/HSTNN-Q78C-3/ HSTNN-Q78C-4/HSTNN-Q81C/HSTNN-I85C-4/ HSTNN-I86C-3/HSTNN-I86C-4/HSTNN-I86C-5/ HSTNN-W79C-5/HSTNN-W79C-7/HSTNN-W80C Fits Models HP:CQ321/CQ325/CQ326/4321/4321S/4320S/4325S/4326S/ 4426S/4420S/4421/4421S/4520S/4525S Series