PREMIUM QUALITY REPLACEMENT NOTEBOOK BATTERY: Bring your laptop back to life with Ninjabatt's high quality laptop battery - Made of high quality materials, top grade battery cells and packed with safety features. TRUE CHARGING CAPACITY THAT LASTS: Every one of our replacement notebook batteries are tested to meet OEM specifications. Our 6 cells Li-ion battery is rated at 49wH/4400mAh/11.1V - true charge capacity that wont let you or your laptop down. COMPATIBLE MODELS: 0MF69 24DRM 312-1433 451-12107 312-1390 312-1392 451-12108 49VTP 4WY7C G019Y G35K4 MK1R0 MR90Y N121Y V8VNT XCMRD Inspiron 14R 5437 15 3521 15 3531 15 3537 15 3541 15 3542 15 5521 15 N3521 15R 3521 15R 5521 15R 5537 15R N3521 17 3721 17 3737 17 5721 17 N3721 17 N5721 17R 3721 17R 5721 17R 5737 17R N3721 17R N5721 3421 3521 3721 5421 M531R-5535 Latitude 3204 3440 3540 Vostro 2421 2521 SAFETY FIRST: Dont fall into buyi