I am relatively new to R/C, but I am very familiar with radios, communications equip, etc thru work. My question is concerning both receiver batteries and Tx batteries.
Basically, at what point do I re-charge the batteries in the field?(I have a field charger...not yet used). With a 4.8VDC Rx battery, is the minimum safe operating voltage = nominal-10% (4.8V-0.48V = 4.32V)? What is that minimum point whereby it is "unsafe" (or maybe "unwise" would be a better term) to fly the airplane?

Same with the Tx battery...what is the minimum voltage?


Regards,
Jim