Got a new charger-Miboxer C4-12, 4 slot X 3A/slot, total 12A output

[Mikeadoo]

@JasonWW

@Mikeadoo

@JasonWW

@Mikeadoo

@JasonWW

Can you just hook it up to a DMM?

What’s a DMM?
I’m guessing some kind of multimeter?

Yeah, digital multimeter.

Do you know what the Sofirn cell is under the wrapper? Does it have a button top? What makes you think it will ever measure less IR than what it is currently?

I do not know what cell it is under the wrapper. I dont know what I’d use to get the wrapper off without damaging the cell. Button top yes and i honestly dont know if it will measure less IR or not. All i do know is that it is now doing what my 30Qs were doing with the crazy IR in this charger.

That is why i am asking on the forum. Do i just use my small box opener to cut open the wrapper a little then peel it off the rest of the way? Exacto knife really. Not a box opener.

No, do you even have a new wrapper to put back on it?
It’s possible the original wrapper might have been removed anyway to keep it from getting too fat in diameter.

When I say “the cell under the wrapper” I don’t mean to cut off the current wrapper and look. You typically have to do some online research or maybe ask Sofirn. Surely somebody on BLF knows.

Yes I do have a wrapper to put back on it. When i was reading Dales review of the Sofirn C8F updated version, he said it was a 30Q (dont quote me on that though).
I took the wrapper off and it just says “ISR18650”

Here is a picture also… Pink in color

[Mikeadoo]

@JasonWW

@Mikeadoo

I used to be getting IR of 60-85 IR but now its way higher

I think your worrying over nothing. What light do you use it in? Is it noticably dimmer?

Maybe you should stop using your C4-12 to measure IR. Surely there is a better way to measure it.

Im not using the charger to measure the IR. It is just there for me to always see. My charger is working great with my cells. I am just trying to learn more but if im annoying you guys i will stop.

[JasonWW]

Dale says it’s not a 30Q, but still performs really well. Here is his post.

The NEW Sofirn C8F Triple XP-L W2 w/side e-switch

I am told that these cells will also be sold on their site after the first of the year. The pink color of the wrapper inside the Sofirn labeling matched my Samsung 30Q perfectly, but the 3 legged top plate looked different. There is a button top spot welded on, but it’s still easy to see there is a difference in the top plate. There is no laser marked branding on the pink wrapper. I cut the pink wrapper off too, nothing at all on the silver body of the light. So I’m not sure what the cel…

I can see it needs a wrapper to help hold the white disc on.

[Mikeadoo]

I seen that also about the disk. Its been a few weeks since I read his post about the cell, so thats my mistake. Sorry. It does perform great! I was surprised.

Thanks Jason, everyone and sorry for all the trouble. You were very helpful

[Pete7874]

@JasonWW

Does anyone know a more accurate and precise way of measuring a batteries IR?

Can you just hook it up to a DMM?

I’ve never actually tried that. I don’t want to fry my meter. Lol

https://lygte-info.dk/info/Internal%20impedance%20UK.html

[teacher]

Charger or battery…
…….Scotch Brite Blue or a clean rag & call it a day.
Add a tiny bit of alcohol if needed. No real need to overthink this unless your batteries or charger get much, much more dirty than mine……

https://www.scotch-brite.com/3M/en_US/scotch-brite/tools/~/Scotch-Brite-Non-Scratch-Scour-Pad/?N=4337+3294529207+3294631761&rt=rud

[JasonWW]

@Pete7874

@JasonWW

Does anyone know a more accurate and precise way of measuring a batteries IR?

Can you just hook it up to a DMM?

I’ve never actually tried that. I don’t want to fry my meter. Lol

https://lygte-info.dk/info/Internal%20impedance%20UK.html

Thanks

Geez, that’s complicated. It’s no wonder the charger has a difficult time trying to measure it accurately.

I’ll have to read the full length of it later.

[dchomak]

Here is HKJ’s review of a really easy to use IR tester.

Test/review of Vapcell Internal Resistance Tester YR1030

Vapcell Internal Resistance Tester YR1030 [image] This is a meter designed to measure internal resistance in batteries. [image] [image] [image] [image] I got the meter in a cardboard box with specifications on the back. [image] The box contained the meter, 4 terminal probes and a manual. [image] [image] The meter is in a standard box, i.e. not a box manufactured for the meter. [image] [image] There are two connectors, a micro usb for charging t…

[Mikeadoo]

@teacher

Charger or battery…
…….Scotch Brite Blue or a clean rag & call it a day.
Add a tiny bit of alcohol if needed. No real need to overthink this unless your batteries or charger get much, much more dirty than mine……

https://www.scotch-brite.com/3M/en_US/scotch-brite/tools/~/Scotch-Brite-Non-Scratch-Scour-Pad/?N=4337+3294529207+3294631761&rt=rud

I do tend to over think things sometimes. Sorry and thanks. I guess it’s just the way i am.

[pennzy]

@JasonWW

@Mikeadoo

I used to be getting IR of 60-85 IR but now its way higher

I think your worrying over nothing. What light do you use it in? Is it noticably dimmer?

Maybe you should stop using your C4-12 to measure IR. Surely there is a better way to measure it.

I second that. My C2 6000 measures every cell I have over 100 mohms . All new cells from good source.

[JasonWW]

@dchomak

Here is HKJ’s review of a really easy to use IR tester.

Test/review of Vapcell Internal Resistance Tester YR1030

Cool device, but it looks like $65 minimum price with battery holder. I don’t think I need to know exact IR that badly. Lol. Maybe in the future.

[teacher]

@Mikeadoo

I do tend to over think things sometimes. Sorry and thanks. I guess it’s just the way i am.

No need to apologize, I know how it is. I can be the same way… it takes one to recognize one you know.

I’m still trying to learn not to sweat the small stuff in many cases….
The struggle is real………

[Mikeadoo]

Thats another thing teacher…. I say “sorry” a lot! It is definitely a struggle when you dont know why you’re apologizing.
Good to know I’m not the only one though

[teacher]

:+1: …

[dchomak]

@JasonWW

@dchomak

Here is HKJ’s review of a really easy to use IR tester.

Test/review of Vapcell Internal Resistance Tester YR1030

Cool device, but it looks like $65 minimum price with battery holder. I don’t think I need to know exact IR that badly. Lol. Maybe in the future.

Yeah, the price is enough to keep one from getting OCD about it. :laughing:

[JasonWW]

@JasonWW

I would like to offer some feedback to Leo on the C4-12.

The only small flaw I have found is that on certain 26650 cells the wrapper will touch the bottom post that sticks out instead of touching the metal battery plate. This causes me to have to rotate or fiddle with the battery to get a good connection.

Maybe it is because the metal sliders lean back too far?

Or maybe the stamped raised section in the slider is a bit loo low?

I’m not exactly sure. It’s not been any kind of a big deal, but maybe it can be adjusted on future versions.

I got a bit annoyed having to wiggle my blue Liitokala’s so I fixed it with an xacto knife.

Problem solved. Lol

My black Liitokala’s don’t have this issue.

It looks like there is a new 26650 Liitokala in blue, it’s got a different label, is rated for 5100mah and has slightly extended ends which make contact end to end with no solder blob needed. Just thought I’d mention it. Bye.

[d_t_a]

@JasonWW

@JasonWW

I would like to offer some feedback to Leo on the C4-12.

The only small flaw I have found is that on certain 26650 cells the wrapper will touch the bottom post that sticks out instead of touching the metal battery plate. This causes me to have to rotate or fiddle with the battery to get a good connection.

Maybe it is because the metal sliders lean back too far?

Or maybe the stamped raised section in the slider is a bit loo low?

I’m not exactly sure. It’s not been any kind of a big deal, but maybe it can be adjusted on future versions.

Actually, I have the same problem on both the C4-12 and the MC3000 (on my MC3000, the negative poles/post leans backwards a lot, and I need to adjust the 26650 for it to make proper connection… this is for the cyan INR26650-50A…)

[JasonWW]

@d_t_a

Actually, I have the same problem on both the C4-12 and the MC3000 (on my MC3000, the negative poles/post leans backwards a lot, and I need to adjust the 26650 for it to make proper connection… this is for the cyan INR26650-50A…)

It’s not really a charger problem, it’s a battery problem. These cyan Liitokala shrink wraps cover a little too much of the negative end, maybe 0.5mm too much. I trimmed off 1mm all the way around and no more issues.

When Liitokala came out with the black version they adjusted the length of the shrink wrap.

The latest 5100 has extended ends. At least some do. It looks like it varies. This guy got two that are different.

(Pictures are coming)

So they keep making small improvements. :+1:

[Lightbringer]

On my almighty C4 I had to gently bend the little sticks more forward, ’cause my 26es just wouldn’t make contact.

[Pete7874]

Would attaching a small round magnet to the rear of the cell solve the issue?