I'm running two 2s (total 4s) lipo 40c 4200mAh on my RC8be. Why does my DX2S show RX Batt: 5.8V after both lipos are fully charged? Should it read it as 14.8V (3.7v*4) or 16.8V (4.2v fully charged*4)? I am also trying to set the DX2S to alert me when the battery reaches low-voltage point which in my case would be 12V. Thanks for any help guys!