Battery type: Li-ion; Capacity: 5200mAh/58Wh; Cells: 6-cell; Voltage: 11.1V. 12 Months Warranty, 30 days money return guarantee and 7 x 24 email support. Any questions you can contact us through mail about the product, we will respond within 24 hours. Compatible Part Numbers: PA3634U-1BAS PA3635U-1BRM PABAS201 PABAS229 PA3634U-1BRS PA3638U-1BAP PABAS117 PABAS227 PA3635U-1BAM PABAS178 PABAS228 PA3636U-1BRL (Not Fit P/N PA3817U-1BRS PA3817U-1BAS)