hello, I would like to buy 3 lipo. 2 for the powerbox sensor (servo) 5X 15KG 1X 30KG 2X standart 1 for the powerbox digi (dle55) you advise me how much Mah (1550?1850?2100?2500?) and which mark (Turnigy , Rhino , ZIPPY LIPO?) Thank you