CWK New Replacement Laptop Notebook Battery for Samsung NP300E4C NP300E5A NP300E5AI NP300E5C NP-RV510-A05US NP-RV515-A02US NP-RV711-A01US NP-R480I R480-JAB1US R580 R580-JBB2 R530 R540 AA-PB9NS6B AA-PB9NC6B Q320 R540 R580 R428 R430 R780 R730 R480 BA43-00282A AA-PB9NC6B Samsung NP300E5E 11.1v/10.8v Samsung NP310E5A NP310E5C NP355E4C NP355E4X NT-RV511 NP-R463 NP-R580H NP-Q230 NP-E3420 NP550P7C NP550P7C-T01CA NP500P4C-S02US 300E4C 300E4Z NP-P580 NP355V Q318E RC420 RC520 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!