BRTONG Laptop Battery for Asus A32-k52 / A31-k52 / A41-k52 / A42-k52 / A31-b53 / K52l681, A52 A52f A52j K42 K42j K52 A42 Series X42 Series Compatible Models: ASUS A32-K52 70-NXM1B2200Z 90-NYX1B1000Y A31-K52 A41-K52 A42-K52 A31-B53 K52L681 A52 series A52F A52J K42 series K42J K52 Series A42 series X42 Series K42 K42D A52 A52F X42 X42D X42DE X42E X42F X52N Pro51 Pro5IJC Pro5IJK Pro5ij Pro51 Pro51sa Pro51S Pro51K Pro51B Pro50vl Compatible part number: 70-NXM1B2200Z / 90-NYX1B1000Y / A31-K52 / A32-K52 / A41-K52 / A42-K52 / A31-B53 / K52L681 Battery type: Li-ion; Capacity: 5200mAh/58Wh; Cells: 6-cell; Voltage: 11.1V Operation time for standard batteries: Around 3 hours, the actual operation time will depend on how much electricity is required by the device and how you use it Overcharger and Discharger Circuit Protection, CE-/FCC-/RoHS-Certified for safety, About 500 recharge cycles over the life of the battery. 24 x 7 email support, 12-month hassle-free warranty