Previously had nitecore 20$ charger. This one is way better since it gives more specs on the status of the batteries. Gives me an indication on the health of the battery since it says how many mAh it's charged since plugged inWorks great for most batteries.It will not charge any kind of flat top or battery with a slightly recessed contact.Other than that, it's fine. The interface is not the best. Can't really see the status of each battery charge with a glance. It can only show one at a time. Not that big of an issue.Build quality is pretty cheap, but this is not a $50 charger.It recognizes different batteries well and charges them appropriately.Some batteries can be difficult to align. Especially aa and aaa.It does not come with a plug. You will need a USB C cable with a high output brick. I'm using a laptop charger. (High output as peak power can exceed 5w for proper charging. With a lower powered brick, it will probably still work, just charge multiple cells much slower, while running the brick at max output capacity. You don't want to be running at max capacity of a power brick.)As note: I have not tested the 9v charger ports as of yet.The only issue I have with this product is, the AAA/AA batteries tend to move out of place from the slot, so you need to find that sweet spot for the batteries to charge continuously.Charges fine. Seems a little slow for 4 new batteries, but it was doing all 4 off a USB power source. Nice screen shows how things a progressing.Easy to useIt didnt work. First slot was loose maybe manufacture error. Never charged??Fairly useless. It charges a few seconds and then shuts off. Goes to "err". I even put new batteries in to make sure it wasn't my batteries. Still went to "err". How do I return it for one that works?Wont operate