Venom Fly 30C 4S 3600mAh 14.8V LiPo Battery with UNI 2.0 Plug (XT60/Deans/EC3) x2 Packs Compare to E-flite EFLB33004S50 Fits Models Like: E-flite Rare Bear, Hangar 9 Piper J-3 Cub 40, and Christen Eagle II 90 Venom Fly - Engineered for Flight, with "A" Grade Matched Cells for Unrivaled Performance. Spend Less Time Charging and More Time Flying. 5C Charge Capable for Significantly Faster Charging. Plug Type: Venom UNI 2.0 Plug. Compatible with XT60 Plug, Deans Plug & EC3 Plug. Backed with Proven US Support and Venom&apos;s Industry Leading Lifetime Battery Replacement Plan.