Nitecore UMS2 Intelligent USB Dual-Slot Quick Battery Charger for Li-Ion/Ni-MH/Ni-Cd/IMR 16340 14500 18650 21700 20700 AA AAA and More Batteries, with LumenTac Battery Organizer

Wonderful Charger !I've had one for 5 years, with the Micro-USB input port.No complaints at ALL, except for wishing it was USB-C.< wink >Now --I just bought a NEW one, and (HURRAY)it now has USB-C input port ! ! !:-)LOVE it ! ! !

I didn’t look much into this charger for my 18350 rechargeable batteries.I’m impressed, very nice lots of information on this. Price is great.

I bought this UMS2 model expecting it to have a micro-USB connector, but it seems they have updated the unit and changed it to a USB-C connector! I was so pleasantly surprised to see this when I got it. Hopefully you wont get an old version though and they have only stock of the new ones.Works great! Love all the stats it gives on the LCD screen. Only thing is that it's a little bulky.

Works as described. Charged batteries in less than 1 hour.

I bought this to replace a Nitecore D2 that wouldn't charge some older IMR batteries I lost track of after a move. This new charger charged all of them with no issues and was very easy to use and adjust. Seems to run cooler than the older D2 but this is likely because it operates with 9V USB power instead of rectifying AC. It's also feels quite a bit smaller and lighter than the older D2. All around a nice improvement over the D2 and I believe cheaper than the D2 was when I bought it so good value.One thing that could be improvedNot a fan of the micro-usb would prefer usb-c or a built in C or A cable that could be wrapped into the device edges.QC2 is fine but PD with PPS might make a simpler and possibly even smaller and lighter device.

I saw all the complaints about the micro USB power input but ordered it anyway. I am happy to report that these chargers are now upgraded with a USB-C power input.

Worked for about an hour. Now it shows something is charging in slot one even though no batteries are even installed. In it. Unplugged it and waited a minute and plugged it in and it still shows something in slot one. I’m not sending it back and I will never buy another Nitecore product as this is the second product of theirs that failed in a short time. I’m 2 for 2In fail with them. A faulty charger can burn a house down so I’m not trusting this company ever again.

From AAA batteries to much bigger ones for lasers and lightsabers, this handles them all. Gives a better charge than the original devices or internal saber chargers. Even revived a battery we thought was dead. That alone makes it a great value for the money.