EBK Extended Life Battery for Dell Latitude E5420 E5430 E5530 Vistro 3560 Laptop , PN : M5Y0X P8TC7 R48V3 RU485 T54F3 T54FJ UJ499 YKF0M X57F1 312-1163 04NW9 312-1242 312-1310 312-1311 911MD 9-Cell Lithium-Ion Primary Battery for Dell New T54FJ PRRRF 2P2MJ Battery ,Dell Latitude E6430 E6520 E6530 compatible with OEM Dell Inspiron 5425 7520 4720 5720 M421R M521R Vostro 3460 Battery ;Type M5Y0X 8858X 4YRJH 8P3YX Laptop Battery, Cell Type: Lithium-Ion, 2200mah+ high capacity SAM SUNG li-ion cell inside,Made by OEM manufacturer in dongguan Capacity: 7800mah, Rating: 11.1V (not compatible with flat,Inspiron series ,Inspiron-5520 ,Inspiron-5525 ,Inspiron-5720 ,Inspiron 7720 ,Inspiron-N5520 ,no dock station ) Please check with customer service before place order Tips : If your battery does not charge and you get amber flashing - go to BIOS - change Bat charging from EXPRESS To STANDARD : went into BIOS (hitting F12 on my Dell e6520) and found a battery charging setting that was set to "Express" I changed it to "Standard" and then the battery worked fine. Also there is a note in the BIOS that some batteries will not work with "Express"