Arrowmax latest 7.4V 2S 8200 Si-Graphene 120C Touring LiPo battery pack. Target focus for the current competition touring market. With the present currency markets needs, the newest Si- Graphene Formulation provides exemplary persistence on Internal Resistance. Size at 139*47*25.1mm utilizing the fat of 320g, its ideal for outside stock class, this battery pack provides a decreased interior resistance and a relatively high average voltage platform over a 5 to 6 minutes operate. "Less fade" is key point with this battery power for the extremely competitive stock class market.