Hi
Have a question regarding voltage on life rx batteri after it has been charged. It peaks on 7,20v , how good does it hold voltage after? Have a vampire that without any use drops to 6,65 after 10 minutes.
My car lipo holds its voltage of 8,40v for a long time

Well, I have a couple of 6.6V LiFe packs I use in my Tx, & when I charge tham sometimes they have to sit for several days before I'm ready to use one. And when I do, they both read at 6.8V in the transmitter(& peak at 7.3V on the charger). It's the same for both packs, pretty consistent(& they hold up well too, my first one is over 4 1/2 years old, my second one is about 6 months old, & both look & perform the same, I can only tell the difference between them by seeing a couple of visual cues(like a nick on the wires of my older one)....

My LIFE batteries for TX last for months all in the 6.6-6.8v range.

You said you're using it as a receiver battery. Could it be your servo(s) draining it?