All batteries must be shipped by a ground shipping method. This new R-Line version has higher capacity, lower internal resistance, and lower landing temperatures. They are more powerful than any graphene battery.  There are different R-Line versions for the needs of different FPV racing competitions. It is worth mentioning that R-line V5 uses Tattu's exclusive technology "Al Boehmite" for the first time, which will offer a significant improvement in overall performance and continuous power output. Check out our other 6S packs and all of our Tattu products! Features Designed for Professional FPV Racing Exclusive Al Boehmite Technology Reduced Internal Resistance Lower Temperatures 150C Rating!! Specifications Dimensions: 77mm x 38mm x 46mm (L x W x H) Configuration: 6S / 22.2V / 6 Cells Minimum Capacity: 1800mAh Net Weight (±20g): 287g Discharge Rate: 150C Charge Plug: JST-XHR Discharge Plug: XT60 Includes 1x Tattu R-Line Version 5.0 1800mAh 6S 150C 22.2V LiPo Battery - XT60