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Thrunite C2 3400mAh Power Bank / Battery Charger Review


One of the most cumbersome things about being off grid is making sure you have the necessary tools to keep surviving and moving forward. No matter in an emergency situation or just enjoying the out doors the rights tools can mean the best experience or the worst experience. Personally I am always looking for ways to consolidate tools. One of these tools I recently came across is the Thrunite C2 Portable Power Bank / Charger that has really allowed me to cut down some of the gear I have to not only carry with me but to add to my go bags for quick access.

Closer Look:

The Thrunite C2 comes in the package with a Micro USB cable, The C2 housing, a carrying case that is made from a nice mesh for breathability when the unit is hot and a Thrunite branded 3400mAh 18650 battery which provides the power. We will look deeper into the batter specs but keep in mind this can use any 18650 battery to power the battery bank and to recharge as you will see below with the construction design.

For the ports the Thrunite C2 has two on the top next to the status button. There is a Micro USB which is used for the power input to charge the installed battery and a USB Type A for the power output port. Next to the ports is the status button that will tell the battery charge when pushed by a blue blinking LED beneath the itself.

When it comes to charging and discharging the Thrunite C2 does not support fast charging unfortunatly but this is also limited to the battery which we will look at below. For the input the C2 has a Micro USB port which supports DC 5v up to 2.4 amps. When charging the LED will flash according to the charged capacity voltage For supplying power the USB A port supports DV 5v up to a maximum of 3 amps out for a total of 15 watts of charging power.


Thrunite C2 LED translations
Charging Under 3v = Red
3.0-3.65v = Flashing Purple
3.65 - 4.1v = Flashing Blue
4.2v Max = Solid Blue
Discharging Under 2.8v = Solid Red
2.8 - 3.0v = Flashing Red
3.0 - 3.65v = Flashing Purple
3.65 - 4.2v = Flashing Blue


Getting the battery out of the Thrunite C2 you can see that the design utilizes a spring on the end caps to allow for a number of different 18650 battery sizes including using protected and unprotected cells. I really like that Thrunite went with this design as well as this allows even flat cells to be used instead of needing a top or bottom button. The included battery is a Thrunite branded 18650 battery that has an advertised capacity of 3400mAh or in watts 12.4w and has a nominal voltage of 3.6v

Specifications & Features:

Input:5V DC, 2.4A Maximum
Output:5V DC, 3A Maximum
Body:T6061 Aircraft Aluminum body
Included BatteryThrunite 3400mAh 12.4W 18650 Li-Ion Chemistry
Operating Temperature:-20C to 40C
Dimensions (LxW):92.8mm x 25mm
Weight:38g (Without Battery), 84g (With included battery)
Accessories Included:1x 18659 3400mAh battery
1x USB-A to Micro USB cable
1x Mesh carry bag
  • The fastest charger with 2.4A input

  • The fastest portable mobile power bank with 3A output

  • The high capacity rechargeable battery which is applicable for various lighting devices

  • Reversed polarity protection system prevents damage to the device

  • Input: DC 5V, Max 2.4A

  • Output: DC 5V, Max 3A

  • Material: AL T6061 aircraft aluminum body

  • Applicable Battery: ThruNite 3400mAh 18650 rechargeable Li-ion battery

  • Working Temperature: -20℃-40℃.

  • Size: 92.8mm(Length)*25mm(Width)

  • Weight: only 38g (excluding the battery)

  • Accessories: USB cable, 18650 3400mAh battery, mesh bag

Testing & Results:

We wanted to test the Thrunite C2 Power Bank / Charger two fold. One we wanted to see how the battery charges using the C2 as the host charger. To simulate loads I used several devices that use a mix of Lightening, Micro USB, and USB-C connections to a USB meter then plugged into the Thrunite C2 USB-A port. The devices were drained to <20% to ensure to consume the Thrunite C2 battery fully. The battery was fully charged to 100% and measured 4.2v using a multimeter before each test. The measurements taken were the charging voltage, charging rate in amps and total charging time in minutes. A note, the iPad has a larger battery than the Thrunite battery, I included this test to fully drain the battery during the test.


All things considered, the Thrunite C2 Power Bank / Charger is a very inovative product design. Sure there are a lot of portable chargers out in the world by the millions but inovation is what sets one products apart from another. One thing I have learned in my years dealing with electronics is that batteries die, and they die when you least expect it. Being able to replace or swap the battery if when it reaches the end of life or worse when you need power is what sets the C2 far from the competition. When it comes to build design the C2 is solid and other than occasional scuffs it will not break the casing. I have had other batteries that have plastic designs and an accidental drop has cracked the cases and destroyed one all together. 

When it came to charging I had no issues with topping it off from either AC power using a USB 5V plug, with a 5V solar panel or from other USB chargers to transfer power at the full 5V 2A rate. When it came to charging devices I found that low charge devices or high current devices struggle with the Thrunite C2 charger. This could be that the battery is limited by the protector installed as the host battery is a Panasonic NCR18650B which has a 2C discharge rate or 6.8A. Since the Thrunte C2 has a 3A limit the circuit system would be the limiting factor. 

Note: During the review since the Thrunite C2 has been out for some time we found it hard to source however, looking on places like eBay, Forums, etc. you can still find it and if you can we highly recommend you scoop it up. 

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