Battery Type: Li-Polymer,Voltage:11.1V Capacity:4000mAh/44Wh. Up to 500 recharge cycles over the life of the battery, meet OEM standard Compatibility: OD06XL BL06XL HSTNN-IB4F HSTNN-W91C 698943-001 698750-171 H6L25AA H6L25UT. Compatible for: HP EliteBook Revolve 810 Series Tablet, HP EliteBook Revolve 810 G1 Series Tablet All our products are Certified by CE, FCC for safety. Overcharge and Overdischarge Circuit Protection, Over-temperature and Short-circuit Protection RISK-FREE: If you have any questions about the product model or are not satisfied with the product quality, please do not hesitate to contact us. You can get the professional after sale service.