Use your 2S Lipos on your Beast!!!

This is the Beast male connector wired to a Mini-Deans-Clone connector

Use this converter ONLY if your Mini-Deans batteries have their POSITIVE prong exposed

Not many batteries are this way, the rare exception is the stock Great Planes Micro F-86 Sabre battery - GPMP0810

Note that the Eflite UMX Beast, Eflite UMX Sbach 342, and Parkzone UM F-27Q Stryker 180 use the same batteries and therefore the same battery connectors.