NiteCore UMS2.
It it is high priced for You then try Liitokala lii 202. Last edition of this charger has longer battery slot and can charge 21700 battery and it have 2x1A output.
Note that Sofirn seems to sell that charger a bit cheaper, if you do end up choosing it:
I’ve personally used the Lii-500 and Lii-600. They won’t fit cells longer than an unprotected 21700, but they’ve got a good variety of testing/charging modes/currents.
I used to charge my 18650 batteries with the generic chargers that came with budget LED flashlights until I came across a Nitecore charger at my local Goodwill outlet store where the junk that isn’t sold in the stores gets dumped in trays and sold by the pound for $1.69 per pound. There must be a lot of people quitting vaping because over the past two years I picked up 5 chargers - a Digicharger D4, three Intellicharger i4 and one Intellicharger i2. They work amazingly well for charging any rechargeable battery I own except for some C and D cells that don’t fit the charger. I see they are not all that expensive new based upon the link below. I acquired two of the ones shown on the left and one on the right for less than a dollar each at Goodwill. Nitecore i4 Intellicharger - 4 Bay Battery Charger | 18650 Battery Store $19 for the I-4
thanks! since it has free shipping, that is better than the price from illumn
thanks for the review link… here is my takeaway: “I found one error: The internal resistance calculation is wrong. And a major inconvenience: It is not possible to see when the charger is done, without pressing a button (It emits a discrete beep when done).”
so, I decided not to buy, since I wanted to use the Internal Resistance info… that does not work.
I bought a UMS2 and it doesn’t really fit 26800 cells. I can technically get them in there but you’ll be marring the wrappings on your batteries every time you charge them. However, with a little bit of Dremel work you can remove enough plastic to allow a comfortable fit for 26800s. I will post a picture of my modification when I am at home and I remember.