--- product_id: 34850960 title: "Klarus K1 Single Cell Smart Battery Charger for Li-ion 18650 16340 22650 / Ni-MH/Ni-Cd AA AAA AAAA C with a USB Wall Plug" brand: "klarus" price: "€ 28.88" currency: EUR in_stock: false reviews_count: 8 url: https://www.desertcart.fr/products/34850960-klarus-k1-single-cell-smart-battery-charger-for-li-ion store_origin: FR region: France --- # Klarus K1 Single Cell Smart Battery Charger for Li-ion 18650 16340 22650 / Ni-MH/Ni-Cd AA AAA AAAA C with a USB Wall Plug **Brand:** klarus **Price:** € 28.88 **Availability:** ❌ Out of Stock ## Quick Answers - **What is this?** Klarus K1 Single Cell Smart Battery Charger for Li-ion 18650 16340 22650 / Ni-MH/Ni-Cd AA AAA AAAA C with a USB Wall Plug by klarus - **How much does it cost?** € 28.88 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.fr](https://www.desertcart.fr/products/34850960-klarus-k1-single-cell-smart-battery-charger-for-li-ion) ## Best For - klarus enthusiasts ## Why This Product - Trusted klarus brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description Klarus K1 Charger with a Lumintrail USB Wall ChargerThe Klarus K1 charger is an advanced and new single bay battery charger. It features an LED display where you can monitor the battery charging process and choose the charging current between 0.5 Amp and 1.0 Amp. It also has an incredible auto-activation function that allows the K1 to reactivate over-discharged short-circuit protected Li-ion batteries. However, it will not charge any battery that cannot be reactivated. The K1 also has DV/dt control technology that can charge Ni-MH and Ni-Cd batteries more fully. The K1 is made from durable fire-retardant ABS plastic and has optimal heat dissipation to prevent overheating. It also features reverse polarity protection, overcharge protection, and short-circuit protection to prevent damage to the batteries.Specifications:​ Input Power: Micro USB DC 5V/1AOutput Voltage : 4.35V/4.2V/3.65V/1.48V ±1%Output Current : 0.5A/1ASize : 115mm×37mm×32mm (Length/Width/ Height)Compatible with：LiFePO4, 3.7V/3.85V Li-ion, Ni-MH, Ni-Cd Li-ion：26650 22650 18650 18490 18350 17670 17500 16340 14500 10440 16340(RCR123A) Ni-MH, Ni-Cd：AA AAA AAAA CWeight: 45g+17g(micro USB cable)Optimal working environment：5%(0℃)-90%(35℃) (fully-laden regular activity)Storage temperature: 0℃-40℃ ## Features - Single Bay Portable Charger - Less than 5 inches long and weighs a little over 2 ounces Features an LED display that lets the user moniter the charging process and pick between 0.5 Amp and 1.0 Amp charging current Features an auto-activation function - Able to reactivate over-discharged short-circuit protected Li-ion batteries The K1 has DV/dt control technology that is able to charge Ni-MH and Ni-Cd batteries more fully Can charge a wide variety of Li-Ion, Ni-MH, and Ni-Cd batteries ## Images ![Klarus K1 Single Cell Smart Battery Charger for Li-ion 18650 16340 22650 / Ni-MH/Ni-Cd AA AAA AAAA C with a USB Wall Plug - Image 1](https://m.media-amazon.com/images/I/61xRe6okGPL.jpg) ![Klarus K1 Single Cell Smart Battery Charger for Li-ion 18650 16340 22650 / Ni-MH/Ni-Cd AA AAA AAAA C with a USB Wall Plug - Image 2](https://m.media-amazon.com/images/I/6188qvZgU4L.jpg) ![Klarus K1 Single Cell Smart Battery Charger for Li-ion 18650 16340 22650 / Ni-MH/Ni-Cd AA AAA AAAA C with a USB Wall Plug - Image 3](https://m.media-amazon.com/images/I/61fY6dW-piL.jpg) ![Klarus K1 Single Cell Smart Battery Charger for Li-ion 18650 16340 22650 / Ni-MH/Ni-Cd AA AAA AAAA C with a USB Wall Plug - Image 4](https://m.media-amazon.com/images/I/61FH0ksDodL.jpg) ![Klarus K1 Single Cell Smart Battery Charger for Li-ion 18650 16340 22650 / Ni-MH/Ni-Cd AA AAA AAAA C with a USB Wall Plug - Image 5](https://m.media-amazon.com/images/I/612t0tmglIL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ This charger is THE superlative choice of for wise "preppers." *by B***. on Reviewed in the United States on September 14, 2020* Make no mistake, this TINY charger is superior to any other conveniently portable single-cell charger that you will likely ever find. In every respect. It charges to exactly 4.2v on li/ions, which cells are what (presently) best power our quality lighting instruments. Etc. That is why I will always have one of these Klarus K1 chargers within reach.That is no joke, either. Without light, when you truly need it, LIGHT, you are in serious -- & very possibly -- perilous trouble ! Few have ever actually known such peril. You do not want to be one of them.Small, portable solar-chargeable panels, or "solar power-banks," the kind that you CAN carry conveniently, and normal power-banks, too... will operate this little charger with full efficiency. This K1 stands alone. In my experience.I have over 46 years experience with lighting instruments, of all types &... "currently" existing battery types. I say to all readers here that I find it difficult to believe that a better such charger will ever be produced. Get two, at least. ### ⭐⭐ Seems to be a decent charger / can't "wake up" or reactivate 18650s that have lost all their charge. *by K***6 on Reviewed in the United States on March 8, 2019* That charger seems to charge good batteries fine. It says it determines the correct mode automatically but I didn't see that. The instructions are very brief and not very clear in terms of what setting to use with what type of battery. My biggest issue is that I read somewhere that this charger would "wake up" an 18650 battery that may have lost all of its charge and had gotten to "sleep". Some 18650 batteries (like the ones we use for vaping) have a protection mechanism called the CID that basically locks the cell into a no-charge state if it loses all of its charge. Unfortunately I left four perfectly good 18650 batteries in a charger but the charger was unplugged. The charge then slowly trickled out of the batteries and once I realized this it was too late. I was hoping this charger would jolt them back to life. It didn't do that at all. Waste of 12 dollars I guess. ### ⭐⭐⭐⭐⭐ It works great! *by D***G on Reviewed in the United States on June 6, 2019* I have a DP12 with the Works II package installed. It has a light on it that uses the 18650 battery. I went to use the light but it was dead. Not wanting to rush out and buy a new battery, I got this charger instead. Its nice because it actually detects the voltage and then lets you know when its done charging. It seems fairly cheaply built, but it did do the job. The battery I have was a Klarus branded battery, but I'm sure it will work for others. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.fr/products/34850960-klarus-k1-single-cell-smart-battery-charger-for-li-ion](https://www.desertcart.fr/products/34850960-klarus-k1-single-cell-smart-battery-charger-for-li-ion) --- *Product available on Desertcart France* *Store origin: FR* *Last updated: 2026-10-07*