Flashlight Series USB-C Smart Power Bank F1 Charger Compatible with 21700 18650 16340 Batteries

I have a few nits to pick about this charger, but it's a fantastic deal at this price. Functionality couldn't be simpler: put in a battery (10440 to 26650, which is a pretty broad range) and wait for the red light to turn green. You can only charge one battery at a time, but, especially for a travel charger, that's likely all you need. Quality-wise, this hits above its weight class as a sub-$7 charger that handles all those sizes. It's not perfect, but it's really well made, surprisingly so for the cost. At the same time, it's very light. Again, this is a great option for travel charging. One thing I noted is that the indicator will sometimes go to green before the battery is at 100%, which I'm basing on the fact that my more expensive chargers tend to be able to put a fair bit more juice in a battery after taking it out of this charger when showing green... but, really, that's so much better than undercharging, and it's not a huge deal. Read more

This met my expectations, especially for the price. It doesn't come with any instructions, so unless you have another unit like this one or have charged batteries before, you might not know the color of the charging light and what it means. I think it is fairly intuitive, but . . .some might not. No worries with the unit. Didn't notice it getting warm, etc. The spring-loaded clip/holder moves freely (i.e. not hard to slide). Read more