Venom 30C 1S 150mAh 3.7V LiPo Drone Battery with E-Flite MCX Plug x4 Packs Engineered for Flight, with "A" Grade Matched Cells 5C Fast Charge Capable: 5C (0.75A) C Rate and Maximum Continuous Discharge (Amps): 30C (4.5A) Plug Type: E-Flite Blade MCX Proven US Support and Lifetime Battery Replacement Plan.