Luna Charger 52V Advanced 300W Ebike Charger
I've used for over 450 charge cycles, no worries here about quality or lifetime.
The option to charge slow or fast is very usefule. Slow for extending battery life or fast when I just need to charge and go.
It doesn't charge exactly to 80% and it seems to have a problem where unless I set the amperage Run on down to 1 or 2 it will skip the percentage I set it at. Also for me at least when I set it to 5 amps it actually only goes up to 3.8 at most so none of the knobs are accurate but it's still nice that I can adjust it