ADDWR Battery for Dell Inspiron 14R 3421 5421 3437 15R 3521 5521 N5537 17R 3721 5721 5737 N3737, Latitude 14/15 3000 3440 3540, Vostro 2421 2521, MR90Y 0MF69 24DRM 49VTP 4DMNG 4WY7C Capacity: 4400mAh;11.1V, 6 Cells, Li-Ion Battery. Class A cells provide fast loads and low power consumption; chip protection offers both security and stability. Overcharger and Discharger Circuit Protection, CE-/FCC-/RoHS-Certified for safety. 100% brand new battery manufacturing,Replacement laptop battery is rechargeable for repeat use and every single lithium battery charging times more than 500 times. Warranty: 12 Months Warranty and 24 x 7 email support.