Excuse me...WRONG
What exactly am I wrong about - do enlighten us all
What do you find temperamental? I've got a little over 1100 proper dives on my Eon Steel (not pool or shallow teaching dives) It has no more quirks than my Perdix. There are things like the water sensor that annoy me as it can keep the DC powered on but no DC is perfectYeah.....Eon Core owner here (I have two of them) and tend to agree. They're temperamental.
The battery charge remaining is a best guess by the DC based on voltage and settings. I would never jump in the water with less than 5hrs remaining - but generally always charge when they get to 50% in case there's a problem and they don't chargeIf I do an hour dive on a computer with under 2 hours of battery life remaining, successfully complete the dive and don't drain the battery to zero