Ok......am I missing something pretty basic here? I bought a radio and am messing with it, figuring it out......the computer tells me when my battery is low.....I'm assuming its reporting the TX power....how do you know when your RX battery is getting low......other than waiting for it to fall out of the sky. Do I just assume that the the TX batt is always more charged than the RX batt? Assuming they were both charged correctly...thanks for helping the new guy