It charges normally, but the charge level indicator is not accurate at all.

I used Eneloop pro 2500mAh batteries for charging, it took about an hour at 0.5A to fill all 4 lines, but when I measured them, the batteries were almost at ~75%. I had to remove them and put them back on to continue charging.

It does charge them, but it's not convenient at all to constantly have to check it. I wouldn't buy it again.

Small, good construction, just what I needed. It has fast charging, normal, slow for rejuvenating worn-out batteries.

I tried it with one 18650, as well as with two 26650 batteries and it charged them perfectly fine. No problem. Plus, the option for 1amp charging is great for battery longevity.