[Review] MiBoxer C2-3000 first look

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RobertB
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[Review] MiBoxer C2-3000 first look

Leo from MiBoxer sent this charger to me to look over. This is MiBoxer’s new dual cell charger, that is now listed on their website yet. Leo has sent HKJ one of these to do an in depth test.

That said,

The C2-3000 is a USB type charger that comes with a 30inch (76cm) cable, and a car charger. High quality feel to this charger, with beautiful contrasting LCD screen, the sliders are solid and very smooth with no flimsy metal. More solid feel to it than the Nitecore D2. ( I have two D2’s) A minimum 2A USB charger is recommended.

The slot button is used to switch the display data back and forth from slot 1 to slot 2. If you hold the button down for 2 seconds it will shut off the backlight.

It is an entry level charger that is fully automatic and would be perfect for someone who doesn’t want or need a full blown analyzing charger. It does not discharge, cycle, or test cells, other than an internal resistance scan. According to the manufacturer, it will sense a 0volt cell and attempt to repair it with a trickle charge. If it can bring the voltage back up, it will switch into normal charge mode. If it can’t, it will display “Err”

Battery Types

The charger selects everything for you such as the type of cell, and the charge rate. Just below the slot number C1, is what MiBoxer calls “electricity percentage”. This displays the percentage state of charge, but has the voltage readout as well. Nice. (right click to view larger image)

In the next pictures, you can see where the charger alternates every 3 seconds between Voltage, Charge current, and Internal resistance.

As you can see in this next picture, after the cell has been charging, the internal resistance settles in. The charge current bumped up to 1.5A as well.

When the charge is complete, it settles in at about 4.18v

It appears, when charging two cells, each slot maxes out at 1A charge current vs 1.5A on a single cell charge.

No problems recongizing NiMH/NiCd, and automatically adjust lower charge current

In conclusion, I really think this charger is going to give the Nitecore D2 and the Xtar’s a run for their money, especially if it’s priced right. The fit and finish is excellent, arguably better than the D2. Nice that it displays voltage, not just percentage, and has the internal resistance data as well. Very well thought out entry level charger.

Thanks for looking

Edited by: RobertB on 03/29/2017 - 07:09
The Miller
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Nice review
With the Liitokala Li500 for 20 or even 15 without adapter it of course is important how this one will be priced.
Looks good nice that count down to fully charged, is that accurate?

RobertB
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The Miller wrote:
Nice review With the Liitokala Li500 for 20 or even 15 without adapter it of course is important how this one will be priced. Looks good nice that count down to fully charged, is that accurate?

I agree, needs to be in that street price range. The timer seems to be accurate (enough). I pulled that cell off the charger before it said “Full”, but it was already showing 0A charging and backing off of 4.2v. The charger seems very rock solid in the way it works as well as the way it’s made. I have a friend who I’m building a couple of lights for, and was going to give him this charger. I think I will give him one of my Nitecore D2’s and keep this one for myself.

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Thanks for the review.

Did the terminating voltage that it reads out[4.18V] correspond with your DMM?

Solitude breeds contemplation which creates clarity. 

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RobertB
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wolfdog1226 wrote:
Thanks for the review.

Did the terminating voltage that it reads out[4.18V] correspond with your DMM?

Yes. Although my DMM read 4.17 probably due to the long cables I have on it. (older Fluke 70) I tested it when the charger read 4.2v and my meter read 4.19v.

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^^^

Thanks,,close enough!

Solitude breeds contemplation which creates clarity. 

Environment molds a person. Perseverance changes them. 

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hello RobertB

 

Thank you for your hard work and nice review. we will pay our attention to your feedback, and our engineer will think your review very carefully.

 

C2-3000 have been list on our web now.

http://www.miboxer.com/eng/p2.html

welcome visit.

Thanks

 

Please sent email any question:sales@miboxer.com

RobertB
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leomiboxer wrote:

hello RobertB


 


Thank you for your hard work and nice review. we will pay our attention to your feedback, and our engineer will think your review very carefully.


 


C2-3000 have been list on our web now.


http://www.miboxer.com/eng/p2.html


welcome visit.


Thanks


 

Hi Leo, did you get the chargers shipped to HKJ? (Henrik)

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Hello

 

Yes, we have sent the chargers to HKJ,and I think he have got it now, let's waiting he's review

 

Thanks

Please sent email any question:sales@miboxer.com

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Nice work Robert. Thumbs Up Good review on a promising looking charger. I really like that it has an internal resistance reading (as long as it’s reasonably accurate) and love that it has a finished charging timer. I can think of many times a “finished” timer would have been helpful.

Welcome Leo. Nice to see you commenting so quickly in response to your product. Keep that up and you’ll find a very good response here.

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Hello J-Dub74

Thank you for your reply, yes, we will listen to your voice any time humbled, and waiting for your suggestion eagerly.

Thanks B&G

Leo

Please sent email any question:sales@miboxer.com

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I got this charger from Sally
I did a first check on it reading the manual and test some nearly full cells

A full review will be posted soon

I am interested to do more tests with different cells and a dummy cell increasing the internal resistance with an external resistor, to see how it adjusts the charge, as there is no option to set the charge current manually

The charger claims to auto adjust the charge current in relation to the cells, I hope they got that implemented well for tiny cells like 10180

The new USB standard with 5/12V is nice implemented, even just adding a car adapter,
as I got no new USB wall supply with 12V, the hollow plug of the first 12V PSU I grabbed from my very old 4 slot NiMh charger fits perfectly
A normal 5V 2A USB charger cant deliver enough for both slots charging with 1.5A, will test that as well with some USB power supplies to see if the charger adjust the charge current even with a small wall adapeter below 2A

So far I can tell that the new internal resistance measurement is far more consistent than the C4 charger as it seems to do the readings over time and even them out, while the C4 just do one measurement when inserting the cell

The contact plate on positive side gets improved to have a larger area making contact to the cell, I was not the only one noticing some wrong resistance reading and voltage drop

A discharge functionality would have been nice, but it tracks the charging mAh on all slots which is definately better than the C4 with only one channel discharge test, which can take all night on a high Ah cell

For a 2 slot charger it is definately wider than some other models making the charge of 2 D cell or 32650 possible

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These look very interesting. Where/when they be available for sale?

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Lexel wrote:
I got this charger from Sally I did a first check on it reading the manual and test some nearly full cells A full review will be posted soon I am interested to do more tests with different cells and a dummy cell increasing the internal resistance with an external resistor, to see how it adjusts the charge, as there is no option to set the charge current manually The charger claims to auto adjust the charge current in relation to the cells, I hope they got that implemented well for tiny cells like 10180 So far I can tell that the new internal resistance measurement is far more consistent than the C4 charger as it seems to do the readings over time and even them out, while the C4 just do one measurement when inserting the cell The contact plate on positive side gets improved to have a larger area making contact to the cell, I was not the only one noticing some wrong resistance reading and voltage drop A discharge functionality would have been nice, but it tracks the charging mAh on all slots which is definately better than the C4 with only one channel discharge test, which can take all night on a high Ah cell For a 2 slot charger it is definately wider than some other models making the charge of 2 D cell or 32650 possible

 

 

Hello Stefan Vendel

 

Thank you for your reply, yes, Sally is my colleague.

 

She will follow up with you, and hope for your review.

Thanks B&G

Leo

Please sent email any question:sales@miboxer.com

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gchart wrote:
These look very interesting. Where/when they be available for sale?

 

Hello

Thank you for your interested in, our website is www.miboxer.com

Or just write email to me:sales@miboxer.com

Thanks B&G

Miboxer

Please sent email any question:sales@miboxer.com

RobertB
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I think the C4 has been upgraded. Henrik will let us know soon. He’s got the C2 as well.

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RobertB wrote:
I think the C4 has been upgraded. Henrik will let us know soon. He’s got the C2 as well.

Not the C4, but I got the C2, but it will be some time before the review is ready.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

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HKJ wrote:
RobertB wrote:
I think the C4 has been upgraded. Henrik will let us know soon. He's got the C2 as well.
Not the C4, but I got the C2, but it will be some time before the review is ready.

 

Hello HKJ

Yes, my colleague Sally sent you C2 3000, and waiting for your review with many thanks

Thank you B&G

Leo

Please sent email any question:sales@miboxer.com

RobertB
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HKJ wrote:
RobertB wrote:
I think the C4 has been upgraded. Henrik will let us know soon. He’s got the C2 as well.

Not the C4, but I got the C2, but it will be some time before the review is ready.

Ah, that’s too bad. Was really hoping to see you retest the C4 too. Sounded to me like he was sending you both.

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RobertB wrote:
HKJ wrote:
RobertB wrote:
I think the C4 has been upgraded. Henrik will let us know soon. He's got the C2 as well.
Not the C4, but I got the C2, but it will be some time before the review is ready.
Ah, that's too bad. Was really hoping to see you retest the C4 too. Sounded to me like he was sending you both.

 

Not yet, this time, we just sent C2 out, as C4 was still under development

Please sent email any question:sales@miboxer.com

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RobertB thank you for your nice review.

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firedome wrote:
RobertB thank you for your nice review.

Thank you,

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Lexel wrote:

The charger claims to auto adjust the charge current in relation to the cells, I hope they got that implemented well for tiny cells like 10180

I don’t know if this is any indication, but it charged a 14500 at 1.5A, same as an 18650. I don’t own any of those tiny flashlights, but don’t most of them have a built in micro usb charger? Anyone wanting to charge a 10180 would have to make a spacer for it anyway, since they aren’t long enough to fit.

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RobertB wrote:
Lexel wrote:

The charger claims to auto adjust the charge current in relation to the cells, I hope they got that implemented well for tiny cells like 10180

I don’t know if this is any indication, but it charged a 14500 at 1.5A, same as an 18650. I don’t own any of those tiny flashlights, but don’t most of them have a built in micro usb charger? Anyone wanting to charge a 10180 would have to make a spacer for it anyway, since they aren’t long enough to fit.


Yikes! That’s way high for a 14500 and WAY too higher for cells smaller than that. Hi drain 18650 are fine there and it’s good for 26650 and the other big cells but I don’t charge 14500 cells above 0.5A personally.
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J-Dub74 wrote:
RobertB wrote:
Lexel wrote:

The charger claims to auto adjust the charge current in relation to the cells, I hope they got that implemented well for tiny cells like 10180

I don’t know if this is any indication, but it charged a 14500 at 1.5A, same as an 18650. I don’t own any of those tiny flashlights, but don’t most of them have a built in micro usb charger? Anyone wanting to charge a 10180 would have to make a spacer for it anyway, since they aren’t long enough to fit.


Yikes! That’s way high for a 14500 and WAY too higher for cells smaller than that. Hi drain 18650 are fine there and it’s good for 26650 and the other big cells but I don’t charge 14500 cells above 0.5A personally.

I thought it was a little high for a 14500 too, but I was closely watching and the cell never got hot. Only slightly warm. The 14500 cell is a newer Efest 650mAh

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Based on all I’ve ever read on the topic it is too high for smaller cells. A high drain Efest cell and even a Windyfire can take it I’m sure, but my understanding is that it’s hard on the cells and will shorten their lifespan. If it charges all 14500 cells at the same 1.5A rate I would not recommend using it on smaller than 18650. Maybe Leo can chime in on the smart technology being used here. It may need some tuning. If there is an argument against my thinking here I’d like to hear it.

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J-Dub74 wrote:
Based on all I’ve ever read on the topic it is too high for smaller cells. A high drain Efest cell and even a Windyfire can take it I’m sure, but my understanding is that it’s hard on the cells and will shorten their lifespan. If it charges all 14500 cells at the same 1.5A rate I would not recommend using it on smaller than 18650. Maybe Leo can chime in on the smart technology being used here. It may need some tuning. If there is an argument against my thinking here I’d like to hear it.

Thats what I would have thought as well. Was also under the impression, as long as the cell doesn’t get hot it shouldn’t be a problem. Maybe MiBoxer is talking about sensing NiMH type cells. It does automatically lower the charge current considerably for those.

I will discharge the same 14500 again and try and chart the curve.

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The charger changes the charge current relatively to the cells internal resistance

So high drain unprotected cells will have too high charge currents

I charged here 7 years old 14430 680mAh recycled from an old camera battery pack
they started on 0.2A,
when the cells got more voltage the internal resistance dropped
before the CV started the one cell had 0.5A and the other 0.6A as their internal resistance got lower
The thing that I dont like is that at some point the charger shows an estimated capacity of the cell instead the charged capacity
both those cells were estimated at 1.5Ah but only got 590 and 630mAh charged

for 18650 the 1.5A are fine

I am doing more charges with different cells and do a time lapse for them, so my review takes longer till I can publish it

I dont like the battery revival for overcharged cells
I had from those old camera battery pulls one 2.13v and one 0.47V batteries
They started to charge on 0.1A
I could see how the charger tried to revive em going up to 0.3A and I aborted the test at this point

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J-Dub74 wrote:
Based on all I’ve ever read on the topic it is too high for smaller cells. A high drain Efest cell and even a Windyfire can take it I’m sure, but my understanding is that it’s hard on the cells and will shorten their lifespan. If it charges all 14500 cells at the same 1.5A rate I would not recommend using it on smaller than 18650. Maybe Leo can chime in on the smart technology being used here. It may need some tuning. If there is an argument against my thinking here I’d like to hear it.

I agree,

1000mAh is TOO high 1500mAh is wayyy too high!

What I have been told is that IMR 10440, IMR 16340 and IMR 14500 should not be charged higher than 500mAh. I would think the same for protected cells.

A lot of people[incuding myself] would charge a IMR10440 @ 300mAh. My Opus has 200/300/500/700/1000 and 1500/2000 for slots 1 and 4

I had a Fenix ARE-C2+ for a few days and sent it back. The specs. claimed it charged everything @ 1amp. Yet they Approved it for ALL cells!

I emailed HQ in China and they tried to tell me that it ADJUSTS the current according to the battery/size. NOT!! I watched the charge cycles and it was a constant 1AMP except for when the battery first went in and at the end of the charge.

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Lexel wrote:
The charger changes the charge current relatively to the cells internal resistance

So high drain unprotected cells will have too high charge currents

I charged here 7 years old 14430 680mAh recycled from an old camera battery pack
they started on 0.2A,
when the cells got more voltage the internal resistance dropped
before the CV started the one cell had 0.5A and the other 0.6A as their internal resistance got lower
The thing that I dont like is that at some point the charger shows an estimated capacity of the cell instead the charged capacity
both those cells were estimated at 1.5Ah but only got 590 and 630mAh charged

for 18650 the 1.5A are fine

I am doing more charges with different cells and do a time lapse for them, so my review takes longer till I can publish it

I dont like the battery revival for overcharged cells
I had from those old camera battery pulls one 2.13v and one 0.47V batteries
They started to charge on 0.1A
I could see how the charger tried to revive em going up to 0.3A and I aborted the test at this point

Will be interesting to see what you come up with when you start your thread. I believe 99% of the people who buy this entry level charger won’t be trying to salvage odd size camera batteries, rather more common cells to use in flashlights and ecig devices.

It’s definitely charging a 14500 at 1.5A, unless the readout is wrong. We’ll see how hot it gets with an IR thermometer.

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Would a option be to use a old cell phone adapter like 500-800mah ones? The charger does 1.5/1 slot or 1amp/2 slots. Use a weak power supply and pop in two cells. The current should be low enough to charge you small cells.

But in all honesty this charger is provably geared towards normal size cells. I mean really how common are 10440 cells. 99% of people provably don’t even know they exist. Its like the contract builds here for lights. Q8/GT etc You can’t make everyone happy. As long as the majority is happy then its a winner. You can’t please everyone with any product.

And my thought is if you use 10440 or smaller cells then yly already have a charger that charges at the rate your comfortable with. Is this flawed thinking?

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