New Miboxer C4-12: "Upgrade C4-12"

Now, if she could still measure the capacity by discharge …

The one you linked to is C4, not C4-12. Two different chargers.

I saw that charger on Amazon a few weeks ago and thought it might be a clone or bait and switch because it was so inexpensive. Looks like you got a good deal, not available now.

Sometimes on Amazon if the item does not have a name brand in the description so it avoids direct search and sales are low the algorithm will keep lowering the price. Also could be seller avoiding conflict with manufacturer for selling low price.

I also had an experience the same case as your here, but on a flashlight. Last time I’ve pre order a flashlight and to be shipped on 20th. I willing to pay because its offer discount and let say price drop by 8%.
On the 20 april, still not been shipped and guess what?? I was so tempted and I dont know where the idea fall from…I took a search of the flashlight on Aliexpress and you know what, it SHOWED UP.

What make me stunt, price set drop –17.5% lower than ori…plus free keychain light, it was really nice offfering! I felt very unfair but just bare to it.

Tip: This is Unathorized dealership avoid been caught. You cannot evenly seem them advertise but they offer was a really nice bargain. Forget about pre order, its crap. But do always look for this dealer, they also have high rating, do wholesale and it store name is pretty well known.

I wish that I know this secret early, I could been lucky. I thought I was the only see this. I hope next time I know where to look for.

Edit: I took a search on a my fav store, click on new arrival tab and and tadaaa, REVEAL hiden item. MAybe for their reviewer customer?Idk

Do look at the FB page, comparison with new vs older.

- 4.35V / LiFePO(3.6V)

- fit protected 21700 battery size

  • temperature value option ( Celsius or Fahrenheit)
    below link for more…
    Redirecting...

Thanks hasddie293,

The FB page has the comparison charts I was looking for.

I still wish Miboxer would implement a safety routine for charging LiFePO4 batteries. Like almost any other charger it will always (re)start with the standard charging profile for 4.2V Li-Ion batteries once there is a sudden power outtage. Guess what happens? A 3.6V LiFePO4 battery will be overcharged to 4.2V. So, a simple "press button to start charging" action would suffice to prevent automatic restart (with the wrong charging profile). Certainly, the user would still have to doublecheck if the right profile was chosen.

Alternative idea: How about making the LiFePO4 profile the standard routine, e.g. by a small switch on the bottom side of the charger?

Still no review/test over “Upgrade C4-12” here in Blf, but really2 hope there will be no mess up since older C4-12 perform so well already.

My expectation is that its will perform as the C4-12 except it can handle long battery, lifepo4 and all slots should work well.

1. Who said that this function is no in Upgrade C4-12? Miboxer introduced it else in C2-4000: https://youtu.be/zLCDC-5KV5A
2. LIfePo4 cells are not so easy to bring to an explosion. Charging voltage 4.2v for them is not terrible: https://yadi.sk/i/L_E7cdG4ALoLoQ

at least a charge profile memory would be nice if the charger detects that between shut down and restart the cells were not removed and charge was not complete
that could be implemented with just a few uA standby drain simply keeping monostable circuit held in the not removed position by the battery voltage

but on the other hand its not so wise to keep battery charging unmonitored by the user, a power loss in your living place is with the amount of electrical devices in modern times usually not unnoticed

@mishanchick, they can still catch on fire, just at a higher temperature.

It seems to me that MiBoxer marketers do not specifically make it possible to make a perfect product. Considering the high price, and specifically half from SkyRC 3000, what should they have added at least one slot the function of measuring cell capacity by discharging? And then there would be an almost perfect device. Even Xtar realized that this function was needed and added it to VC4S.

MiBoxer already has one of the best analyzing chargers in the C2-4000, problem is it requires that loud, bulky fan. I’m surprised the VC4S added that and stuck with the stupid voltage dial where you cant accurately tell what voltage your battery is

С2-4000 is out of production apparently, because it is not on sale anywhere.

Lii-500, VC4S had function of discharge… only question of, how will they perform on their discharging style…I heard issue rise one of em.

But if Miboxer added discharge function, it could had jack the price even higher?IDK…

I also consider the price, just a bit on high side though…but I had bought it :laughing: . But don’t expect their sale could beat other competitor like XTAR, LIITOKALA, OPUS…

Interestingly, fixed MiBoxer problem 3 slots in the Upgrade C4-12?

Old C4-12 - problem (reviews from BLF)
C4-Plus - problem (reviews from Aliexpress)
C4S - problem (reviews from BLF)

I want to understand - did the MiBoxer engineers work on the bugs, or their problem of the updated C4 series was transferred to Uprgade C4-12 also.
Apparently the quality of products is affected by the fact that it is produced in very small batches.

What is “problem 3 slots”?

Slot 3 stops working after a short time.

For example: MiBoxer C4-12 ~ Bay 3 quit charging. ~Now with more pictures~