Bobberman reviews the Begadi CYMA CM.131 "Gen.3" AEP that comes equipped with a MOSFET... "The Gen.3 version of CYMA AEPs, a micro mosfet is installed and a matching 7.4v LiPo battery is included to ensure a better response. The battery can be charged directly via the balancer using the included USB charging cable. The charging time is 40 - 60 minutes, depending on the condition of the battery.