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.
For one of the most recommended chargers with accurate testing there is the Opus BT C3100 v2.2 charger from legit AliExpress store: Page Not Found - Aliexpress.com(link is external). It is about $35 IIRC, half the cost of same thing on Amazon. The seller I quoted is legit and the thing came in around 10-12 days. AFAIK Opus is one of the few chargers that could test internal resistance and capacity accurately. Google it.