Nitecore UMS2 Dual-Slot USB-C Fast Charger, for 18650, 21700 batteries

Excellent product and nice looking also

Perfect, just as ordered

Best Practical Charger for 18650 Rotation — Fast, Smart, and Easy to Trust

The Nitecore UMS2 has been a great charger for my 18650 setup. I’m rotating multiple married pairs, and this unit is exactly what I needed: clear display, intelligent charging behavior, and USB-C convenience. It charges quickly and safely, and I like being able to monitor charging status in real time instead of guessing. Build quality is solid, and it handles my vaping batteries with no drama. Paired with a quality GaN USB-C wall charger, it performs even better. Only limitation: it’s a 2-bay charger, so if you’re charging many pairs back-to-back, it takes longer than a 4-bay. But for most people, the speed/safety/portability balance is excellent.