CWK New Replacement Laptop Notebook Battery for Samsung Q528 NP-Q528 NT-Q528 Q530 NP-Q530 NT-Q530 NP-Q530-JS05SE RV520 NP-RV520 NT-RV520 RV520-S04 RV520-S04 RV515 NP-RV515 NT-RV515 RV515-S01 RV51 Condition: Brand New - Grade A cells Battery Type: Li-ion Voltage: 11.1 Volt (10.8 Volt compatible) Capacity: 5200mAh (Better than 4400mAh) 90 Day Money Back. Buy with confidence!