Awesome single battery charger for your car or home. I use it my car & it works well. Charges numerous battery types. Klarus quality & low price.

Works well when charging. Easy to use. Indicators let you know when it has finished. Good buy.!

The battery charger works well, and also allows me to charge other batteries I have.

Don't waste you're time on any other single cell smart charger. For the price and performance, this is it.

Just what I wanted. Wonderful customer service

Charged several different batteries and it worked great!

Compact and easy to carry, automatic battery detection, and amperage selection.

Love the charger. it let's u know when its fully charged with the left lights.

Worked at first, but the USB connector broke. Now it's useless. Waste of money.

This smart charger is an excellent product. It intuitively knows the battery that is loaded and charges appropriately. What more can you ask from a single charger. Excellent price and great features make this a wise purchase.

Best single bay USB charger you can get for 10 dollars works great and I like the 1 amp or 1/2 amp charging option. I would definitely recommended this charger.

works great and relatively quick...ability to travel well a plus with usb capacity

For the price it's hard to beat. I only need to charge one battery at a time. My only complaint is that the battery falls out very easily.

Overall I'm quite happy with this charger. With Lithium cells, it terminates the charge around 4.15-4.17 volts. I like this slightly lower termination voltage, because it should increase the number of cycles in the cell's lifetime, at the expense of getting slightly less capacity with each charge, which is what I personally prefer. The exact charge termination voltage is not configurable, so if you want to go to 4.20 exactly to get the maximum capacity, consider a different charger. It's convenient that it does NiMH and also Lithium Ion (three types) of various sizes. It also reactivates protected cells whose protection circuit has tripped due to overdischarge (personally verified this works). I also like that it takes a 5V USB input instead of a wall plug, since then you can use it in your car or with a solar panel or when travelling to foreign countries. The charge progress LEDs are not very accurate. With a nearly-dead NiMH, the first few minutes go from 0 to 3 lights, and then it takes another 4 hours to go from 3 to 4. Lithium-ion is better than that but still not linear. This charger is very similar to the K2, which is a double-bay version. Do note that although the K2 can work in reverse as a USB power supply, the K1 does not include that feature.

This was apart of a gift. It was never delivered. We received a notice that the Klarus charger was on backorder but that date has come and gone. Never delivered.

Love it!!

If you us a USB port or a wall charger it will charge multiple types and sizes of battery.