I bought a new IR illuminator that sort of ‘requires’ button top protected 21700 batteries. I don’t have any such batteries (yet), but I’m reluctant to get a special purpose (no analysis) charger just for that size. Can anyone confirm or deny their MC3000 accommodating a 75mm long 21700 button top?
If the answer is no (cries), what charger/analyzer is at least as good as the MC3000 that CAN handle that length/size?
This battery: Protected 5000MAH 10A 21700 Button Top Battery
No, won’t fit. Max length is around 71mm.
Thanks!
Even standard 21700s barely fit.
I hope you have fun here, DarkSky7!
I’m not aware of one.
My charger of choice is the Vapcell S4 Plus.
https://lygte-info.dk/review/Review%20Charger%20Vapcell%20S4%2B%20fast%20charger%20UK.html
It’ll accept cells up to 76.9mm long, but it does NOT analyze cells like the MC3000 does.
It’s a great charger, and it’s a quick charger, and it’s not that expensive considering how nice it is.
There’s Version 2, which is sometimes discounted, and there’s Version 3 which is a bit better in some ways.
If Version 2 is cheap enough, that’s what I would order, but of course it’s not exactly what you’re looking for. 
Keep this in mind though. Quotes from the test/review linked in last post:
“The internal resistance values are only about half of actual resistance, but they are fairly consistent.”
“I found one error: The internal resistance calculation is wrong.”
The S4 Plus will fit the cell. I have, and just tried, a Cyansky USB rechargeable cell that is a bit over 76mm.
The VP4 S4 plus is not even close to being as good a charger as the MC3000. But then, I don’t believe that there is any cylindrical cell charger in existence (for personal non-commercial) use) that can touch the MC3000 for versatility, and accuracy. Of course, if you must use the longer cells you need something that will charge them.
I think you might have meant S4 Plus?
If so, while I didn’t read that entire test I quoted from, I gather it does do charging OK. One would, however need to keep the ‘auto-charge-current-selection’ feature disabled, as IR is what that selection is based on. That’s one reason for my ‘keep this in mind’ comment.
Yeah you are right. S4 Plus is what I meant. I edited the post. I have both of the chargers… so sorry for the brain fart. The VP4 will not accommodate the 75 mm+ length cells. Plus it is pretty expensive for what it is. Still not a match for the MC3000, by a long shot.
Yes, I set this to the manual selection when I got the charger and it has not moved. I read of too many people that had problems using the auto setting. It is easy to see why this could be as this kind of charger is notorious for inconsistent IR readings.
This. If you want the features of the mc3000 with longer cells, it’s time to build yourself an adapter setup. Typically a dummy cell with leads, and you can choose the apparatus to connect the large cell. As simple as magnets on the end of wires, or as fancy as longer spring-loaded cell holder.