Spektrum Smart G2 Pro Series Air LiPo Battery Overview: Spektrum is proud to introduce our lineup of Smart LiPo batteries designed to provide consistently higher voltage throughout the entire run of the battery under even the most extreme amperage loads. For RC pilots, maximum capacity and power are key, and the new Spektrum Smart Pro- Series Air batteries deliver! The Pro series batteries allow for more capacity to be squeezed into the LiPo cells, allowing for larger mAh and C ratings when compared to similarly sized battery packs. Specifically crafted for RC air applications where every inch of space counts, these batteries are perfectly suited for airframes where space is at a premium. These innovative cells offer a compact design without sacrificing the reliable power and flight times you demand. The Smart Pro-Series Air battery's benefits include longer battery life, better performance over the life of the pack, and the peace of mind that comes from knowing your Smart battery is maintenance-free. When a Smart Pro-Series battery is connected to a Spektrum Smart charger, its unique charging parameters and health information are uploaded to the charger from its integrated memory microchip. You can view and set preferences through the charger, such as charge rates, so all that's required to charge the pack is connecting it to your Smart charger. Smart technology takes care of the rest. Spektrum Smart Pro-Series batteries store a wide variety of essential information, including: Battery Brand Battery Type Battery Capacity Battery C Rating Individual Cell Voltage Battery Temperature Charge/Discharge Cycles Spektrum Smart Pro-Series Air batteries also maintain an error log, including over-heat, over-discharge, and over-charge incidents. This data can help assure that the battery you've chosen is suitable for the application