Hi, what batteries can we use with our ALTA? I really like the batteries from SLS: http://www.stefansliposhop.de/lipos...SLS-APL-10000mAh-6S1P-22-2V-25C-40C::949.html is there a limit in size for using a batterie with the ALTA? the connetcor at the SLS batterie is a XT90 connector (wich i like very much). does anybody know what kind of connector the ALTA uses? thanks!