Originally Posted by Harry D
Here are a few IR readings on some GensAce packs I did a couple of weeks ago, using Wayne's meter :
3S1300 - Cells: 7.96 7.52 7.68 Total = 23.16 FOM =1.20
3S1500 - Cells: 6.80 6.64 6.84 Total = 20.28 FOM = 1.18
3S5500 - Cells: 1.88 1.92 1.84 Total = 5.64 FOM = 1.16
Temperature was 20°C.
I bought these packs about two months ago. The 5500 mAh pack was "as received". The others have had a dozen or so cycles (by normal flying).
The low IR values are confirmed by CBA discharge tests and flying experiences. Truly remarkable packs.
These are their so-called 25C packs. (I forgot to mention that, as I never pay any attention to any manufacturer's stated C values because IME those numbers are completely meaningless.)
Total is sum of IR of the cells, so not the measured pack IR with the ESR/IR meter
question what means FOM ?