It’s back in stock on Amazon now, also discounted like it was 5 months ago, with a -$12 coupon code 3H3FEL8G discount bringing it down to $18, but I don’t know when this discount will end. Since it has been out of stock for a while it might sell out faster than usual.
Did someone try to charge 21700 battery with this charger, is it possible?
Yes it can charge 21700. My particular unit is wildy inaccurate though so if you don’t already own it, I’d look into other chargers.
Checking voltage with a DMM after charging has resulted in 4.15 to 4.25!
Yeah, it’s snug, but they do fit just fine. Slooooooow, though.
Hmm. I just got some 26650s, will have to try ’em and see. Good pernt.
On my 21700s, they all kicked off at the same voltage reading, but dunno how that’d correspond with actual measured voltage on a DMM, same meter across each of the 4 cells.
Don’t have any issues with 26650 with my C4.
Thanks for reply.
Yes i already have C4 charger, but no 21700 battery yet and if i buy C8F or FT02, will need to buy some.
Will check next time all four 30Q batteries before and after charging with a multimeter.
Yesterday I charged 4 fresh 30Q’s…2 at 1A and 2 at 500mA. After the first 2 finished I swithed the 2 500mA over to the 1A slots to finish up so I could test out my new BLF GT before going to bed. Charged another set of 4 on other chargers. I wanted to make sure they were all charged to 4.2. Checked the first 4 from the XTAR chargers and they were all 4.2. The 4 from the Zanflare were 4.17, 4.18, 4.24, 4.25. I didn’t note which ones were from the 1A charge and which were from the 500mA + 1A but either way 4.25 ain’t cool.
My guess from reading this thread is the that the 4.17 and 4.18 were the 1A and then discharged because I wasn’t hovering over them and they probably sat for awhile after they were done charging before I swapped the 500mA’s over.
I’m used to better quality chargers like my iCharger 106b I use for LiPos so I ordered an MC3000 and it can’t get here soon enough.
4.17 > 4.25 are all within spec.
The difference is …….trivial.
10 seconds in a light and the ‘over charge’ is gone. You almost can’t measure the capacity involved without significantly expensive professional equipment.
There are sure a lot of OCD people in this forum.
You are spending $$ on hundredths of a volt.
Think about it.
The MC3000 is still consumer grade. You are quibbling over 0.0x volts.
Why would you charge a Li-on, and then immediately charge it AGAIN? Then be upset if it was 0.05 volts over the usual/expected norm?
I guess I’m still kinda stuck in my RC days when we’d pull 150A+ out of a 4s setup and having unbalanced cells could cause bad things to happen when low voltage cutoff couldn’t keep up with voltage sag on a bad cell. Something about seeing 15’ flames shooting from a little car sorta sticks with you.
But yeah with these relatively low Amp applications not as big of a deal.
My C4 is getting LCD screen ‘rot’. The upper right corner top and right side are going from blue to white slowly. The white completely destroys the information.
Anything I can do about that? I would guess this applies to many LCD screen chargers.
Charger is way beyond warranty. Getting so it looks to be hard to find a replacement, or very expensive now, should it go too far and I want one.
Try gennnnnntly pressing on that corner, and see if it gets better or worse.
If better, some compression could fix it somewhat.
If worse, obviously don’t touch it.
Tried that. There’s a plastic protective plate over the actual LCD screen. Using a pencil erasure I put pretty decent pressure on it to no effect at all. Mmmm.
Hmm, sometimes, then, the glass seal breaks and the LC “ink” inside drains out.
Hey everyone my first post and sorry for reviving the thread. So measurements come out a bit higher than they’re supposed to? I’m in the process of creating an ebike battery and have about 107 of these cells that I need to accurately test (A guy on photonlexicon actually hooked me up with these batteries, really awesome guy!). Panasonic 18650 NCR18650 Battery Fast Shipping from Florida-USA lithium-ion
I like these chargers from what I’m seeing on youtube and other sites including this one but I’m just concerned about that accuracy. The OP is the only one who has actually delved into these chargers in GREAT detail. You can get two of these for about 60 bucks so I really hope I can trust them. What you guys think?
Compared to my Opus and almighty Miboxer, yeah, the Zanflare consistently reads about 10% high. Maybe it’s just optimistic.
Ok when I order mine I’ll do tests and post my results here. I think I’ll be ok with them. I’m also going to pick up one of those tec-06 testers and do a comparison. You guys ever see those? A guy on youtube did extensive testing on them and they proved reliable. We’ll see
fantastic detailed review, and great info from you folks. thanks for the inner bits pictures DEL. 
this charger (got one for Christmas) is great for charging up to 4 at 750mA in my opinion. 3@1A?
would be SO much better if there were vents on the top side of the charger by the screen.
doing a capacity test with 4x500mA the area around the screen gets pretty warm.
if i were to charge at 4x1A, i would use active cooling, and a beefier 12v supply.
mostly use it for charging my pair of 25Rs for my SST20/S2, and a pair of 30Qs for my XPL-HI/C8
rotating them. my last 30Q gets charged in my Pico mod with a magnetic cable.
i just received 4 sammy 35E protected cells for when my BLF LT1 arrives. they are from 2 different batches.
this is the first time i did a capacity test. all 4 cells were at 3.55v.
charged them to about 4.1v at 750mA, then changed to ‘NOR TEST’ (normal) @ 500mA.
took forever, but here are the results.
batch JM2T
3571mAh
3687mAh
batch JL1T
3602
3649
if i calculate 10% high (reading x 100 ÷ by 110(or ÷ by 1.1) as many report…
3246mAh
3351mAh
3302mAh
3317mAh
that seems more realistic for these cells. i’ve read you can expect around 3350mAh from a 35E.
these are protected, don’t know if that affects capacity or resistance.
what sold me on the C4 charger is the internal resistance reading got praised by a few reviewers.
the IR will go up as cells age. also being able to view voltages instead of percentages! 
i usually charge to 4v to prolong the battery’s service life. i may switch to 4.1v
i’m not often testing, or testing a lot of cells, so the slower/higher reading capacity test isn’t an issue for me.
being able to use ‘FAST TEST’ to discharge cells to a storage voltages (3.5v) is nice to have.
trying to sync the settings for all 4 batteries can be frustrating. first stops blinking by the time the 4th is pushed in.
i found just quickly pushing the cells to briefly disconnect them, you can get them all flashing to sync the settings for all 4 cells.
yes, you can use the button for each cell to get them to flash, but if the settings are out of sync it’s like playing wack a mole. lol
cheers
/richard
I have this model and noticed this immediately. Isn’t this a waste of time/power? Why wouldn’t a good charger detect a full state and abort a recharge?
Am I reading this correctly or do I have a defective device?
Thanks
This is normal behaviour, you cannot detect a full battery immediately, you need to charge a bit first. For NiMH it can take up to half an hour to detect the full battery, for LiIon it is much faster.