Jmt 1 to 12 Charge Board for 3.7v E-flite MCP X Walkera Rc Helicopter Lipo Battery Akku Use any 1 cell 3.7v li-po charger can charge 1-6 MCP X batteries together Please check your charger compatible the Banana Bullet battery plug before purchase Special Design-Battery connect port-6PCS For E-Flite 6PCS For Walkera battery