Looking at the reviews, the IR function on the Liitokala just doesn’t work, while on the Opus it does appear to work. I think I’ve read the Opus capacity measurements are higher than actual, by a fixed fraction I presume, so keep that in mind. The Opus uses PWM to regulate charge and discharge current, with quite high pulses of ~2.5A. I imagine this can’t be good for charging some cells, but I could be wrong. Edit: it’s probably fine: Best bang for the buck charger? Anything on the horizon? - #26 by Speed4goal