AM Lipo 5200mAh 2S TC Ultra Low Profile - 7.4V 55C constant 110C Burst 5mm (Si-Graphene) The latest and newest Arrowmax Red Series battery pack AM-700712 may be the lowest profile pack in the market which can be just 19.5mm thick for reduced center of gravity, and less weight which will be only 237g. This Red Series battery also features Silicon Graphene technology, which is popular for increases in period life & efficiency. This might be very effective in modified racing especially within the small track. As always, this provides you well balance of energy, enough capability, and low interior resistance. Lighter rules is now a trend in Touring events, existing LCG might be to dense for some of users. This 19.5mm dense ultra low profile pack is perfectly created for those racers concern of height and traction roll issue. The reduce in height and fat will certainly satisfy them.