Venom 30C 1S 500mAh 3.7V LiPo Drone Battery with E-Flite MCPX Plug x4 packs Engineered for Flight, with "A" Grade Matched Cells 5C Fast Charge Capable: 5C (2.5A) C Rate and Maximum Continuous Discharge (Amps): 30C (15A) Plug Type: E-Flite Blade MCPX Proven US Support and Lifetime Battery Replacement Plan.