(Review) MiBoxer C4-12 NiMH-NiCd-Li-ion Battery Charger

Supplied via MiBoxer for product review

The MiBoxer C4-12 is an intelligent high amperage 4 slot battery charger with power bank functionality for charging seperate devies off your rechargable batteries via USB port on the side of the device. The C4-12 supports up to 3.0A per slot for high efficency charging rates compared to most other chargers on the market. This charger stands out due to the fact it has an intelligent charging system where the charger takes information from the inserted battery and automatically chooses and adjusts the carging current based on the batteries specs.

This charger can be bought on Amazon for $49.99


Specifications Listed by Manufacturer

Size: 6.2in*4.7in*1.7in
Weight: 485g
Material: Fireproofing PC+ABS
Color: Black
Input Voltage /Current: DC12V 5A
Output Voltage: 4.2V±0.1%/1.48V±0.1%
Output Current: Li-ion maximum 4*3A /Ni-MH/Ni-Cd maximum4*1A

Apply to:
Li-ion(4.2V) (IMR/INR/ICR) 10340 / 10350 / 10440 / 10500 / 12340 / 12500 / 12650 / 13450 / 13500 / 13650 / 14350 / 14430 / 14500 / 14650 / 16500 / 16340(RCR123) / 16650 / 17350 / 17500 / 17650 / 17670 / 18350 / 18490 / 18500 / 18650 / 18700 / 20700 / 21700 / 22500 / 22650 / 25500 / 26500 / 26650 Ni-MH / Ni-Cd(1.48V):AAAA / AAA / AA / A / SC / C / D

Package information:
Package include:
1*C4-12 Battery Charger
1*Adapter( 12V 5A)
1*User Manual

Adapter information:
Input Voltage: 100-240V
Output Voltage: 12V
Output Current: 5A
Material: PC

Super Fast Charger 3A for each slot, total 12A; four slots charging independently with a power bank function.


Only 4th slot have the usb output function, and only for li-ion battery. It can’t charge for LifePO4 and 4.35V li-ion battery.


Weight: 485g
Product size (L x W x H): 6.2 × 4.7 × 1.7 inches


1*C4-12 Battery Charger
1*Adapter( 12V 5A)
1*User Manual

included AC-DC adapter outputs 12v 5A Max

Physical Attributes

The MiBoxer C4-12 is made out of ABS plastic and seems to be made very well. The single button feels very nice and feels like it will hold up to regular use. The negative contacts are very smooth and the batteries are held in quite tightly except for 16340s and similar sizes.

This charger can hold up to 4 26650s side by side in the charger with ease.

Cooling The unit

This unit doesnt offer up any active cooling but the software does take that into account via system throttling if the tempature of the batteries exceed 60°, if the batteries exceed 70° the charger will completely stop charging and display “Err”.


the unit is approximately 4.6” × 6” or 11.6cm × 15.2cm

Display and Selectable Modes

The Charger has 8 different pieces of information displayed on the screen when charging batteries, it shows the temp, internal resistance, current, voltage, charging time, battery capacity, battery percentage and battery type.

The C4-12 doesnt have any other modes except charge, but the charging current is selectable by holding down the button for 3 seconds. Once the button has been held down for 3 seconds the amperage readout will begin to blink and you can go through 10 different charging currents or select auto and let the carger decide the current. The carger also is able to restore over discharged lithium batteries.

Selectable currents are as follows



Ni-MH/ NI-Cd


Supported Batteries/ Technical Data

Other Features

The powerbank feature has a max output of 5v 1A from the USB port, it is powered by inserting a battery in slot 4 of the charger. (this only charges from the 4th slot not all 4 slots combined)

Final Thoughts

The MiBoxer C4-12 is a great charger if you want to get the most out of your batteries thanks to the auto charge feature where it will ramp up/ramp down the current depending on the current state of the battery. This is my favorite charger I have used so far because of how fast it can charge and all of the data it can tell you about your cells. The power bank feature works as advertised but I wish that it ran off of all four slots instead of just the one slot it supports. All in all I would recommend this charger as it is a great buy for such a quality charger.

I try to use this charger for the first time today,but I can’t change the current.I have put 4 pcs of 18650 30Qs,and the current is changed itself from 0.5A-1.1A.
I press the MODE button,but I can’t see the 8.88A writing.
Any suggestion please?