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Please check BEFORE purchasing the shape of YOUR connector on the PC, because there are 2 models depending on the month of manufacture of your device! DC power connector for Samsung NP-N220 NP-N230 NP-N350 NP-NB30 NP-NC110 NP-NF210 NP-NF310 NP-RV508 NP-RV510 NP-RV515 NP-R730 N148 N150 N128 N140 NP-R525 NP-R530 NP-R540 NP-R580 R428 R429 R440 R423 R425 R510 R560 R700 R70 R71