CWK&reg; New Replacement Laptop Notebook Battery for HP Pavilion dm1-1000 dm1-2000 dm1z-2000 dm1z-2100 dm1z-3200 HP Pavilion 572831-121 572831-351 572831-361 572831-541 572687-001 HP 572831-121 572831-361 572831-541 580029-001 586029-001 HP Compaq Mini 311c-1000 311 311-1000 HSTNN-DB0N HSTNN-OB0N Condition: Brand New - Grade A cells Battery Type: Li-ion Voltage: 10.8 Volt (11.1 Volt compatible) Capacity: 5200mAh (Better than 4400mAh) 90 Day Money Back. Buy with confidence!