Advice of Lipo IR.

[himalaya]

a 20C 5Ah LiPo cell should have an IR no more than 3.7mΩ/cell. 7.4mΩ total for a 2S pack, 30mΩ looks too large. make sure you were charging your pack in a warm room when make the reading.

Which Hyperion charger are you using? the Hyperion chargers was never acurate in IR readings, my EOS0610i reads twice as large as the actual value and now it gets obviiously lower than actual after a firmware update.