Originally Posted by
sn47som1
What is the acceptable lipo internal resistance number range per cell or in total, to decide whether a lipo is past its good performance window and/or life span?
I think it depends on the device you use to measure the IR. I personally use an i-charger 406 and I found that when batteries get over 2.2 ohm, they seem to start to lack punch. That's the threshold I use, but it's also based on the data I get from my charger. Yours might yield different results.
Martin Paradis