JDB is a technology-driven brand that is known for developing fast charging components like rapid rechargers, lithium batteries, nickel batteries, chargers, hands-free accessories, digital camera batteries/chargers, portable computer batteries/chargers, and other tech products for different phone models. I previously tested some of their products such as their MFi certified data line, latest JDB wireless charger, and a 10-in-1 USB charger. This time, I’m excited to test their recently launched JDB Quick Charge 3.0 20000mAh Mobile Power Bank that they just dropped at their flagship store.  Let’s take a look!

The Unboxing

It comes in a black packaging. The image of the power bank is shown on the front and the QC3.0 icon as well as the product name are printed at the bottom.

The specs are printed on the back. It’s input supports 5V2A/9V2A fast charging and a 5V2A/2 output port with 3.6-6.5V3A 6.5-9V2A9-12V1.5A. 

On the side of the packaging, there is an input/out, Qualcomm fast charge and cell phone bracket logo.

The black power bank is securely packaged in a plastic tray, along with a micro USB data stub, product certification and warranty card.

The Appearance

The JDB and QC3.0 logo are printed diagonally across the corner. The mobile power bank shell is made out of PC+ABS, a leather-like material.

The back of the power bank is simple with a minimal design.

The specifications written on the back are:  Model: X1-8 Capacity: 20000mAh input: 5V2A/9V2A fast Charging output: 5V2A/2 port 3.6-6.5V3A 6.5-9V2A 9-12V1.5A.

The cell phone bracket allows the phone to stand so users can stream videos and charge their phones at the same time.


There is a LED indicator with four LED lights to show how much battery is left. Since there are four lights, we can assume each light represents 25% of the battery life.

The output panel; it features a Micro USB port, 2 Type-C ports, an orange QC3.0 port, and a black 5V2A output port.

The Testing

The power bank weights 463g. For a power bank with 20000mAh capacity, it has an average weight.

Like we said before, the power bank shell is made out of a leather-like material with a smooth edge design for easy convenience. Most of the power bank’s weight comes from the lithium battery. 

Both of the power bank ports has a voltage of about 5.09V when nothing is plugged in.

We conducted a fast charging test, and it supports QC2.0 3.0 protocol, with voltage 12.04V, a current of 1.68A and output power of 20.22W, the output power is higher than the product description.

Output testing: 4.97V (voltage ) 3.46A (current)

Output power: 17.23W  (higher than the product description)

After testing it with the Mate 9, we found the output was at 5.07V for voltage and 1.26A for current. The output power is at 6.42W, but doesn’t support  FCP or fast charging for the Mate 8. 

After testing it with the Onda power bank, the voltage is 9.16V, current is 1.86A, and output power is 17.12W in regular charging.

After testing it with the Quanhan PD power bank, the voltage is 15V, current is 1.92A, and output power is 17.61W in regular charging.

After testing it with the Chi Wei QC3.0 in its fast charging mode, the voltage is 9.14V, current is 1.88A, and output power is 17.22W in regular charging.

After testing it with Huawei in its fast charging mode, the voltage is 9.21V, current is 1.87A, and output power is 17.22W. Side note, it does support FCP.

The Dismantling

Buckles can be found on the upper and lower part of the outer shell and can only be opened using tools. If not, the entire shell will be scratched when you tear it apart.

It uses the Samsung 18650 battery with a 2800mAh capacity, which is rarely seen on the market. This is even my first time seeing a 2800mAh Samsung battery.

The batteries are placed into four columns and 2 rows. The positive sides are wrapped with high-temperature tape. The positive lead is then isolated from the indigo paper and the negative electrodes. Protective measures are in place.

There are nickel strips on the negative poles of each battery. The welding is nicely done and the entire battery pack is attached to the shell with 704 glue.

There are two fixed screws on the back of the PCB board. There aren’t too many components there except for all the LED capacitor resistances.

Here is the front of the PCB: upper left is a USB and Type-C input, upper right is two USB-A output, the middle is the Ying Ji chip IP5318. The IP5318 adopts the ALLinONE fully integrated SOC technology, integrates Type-C protocol, QC3.0 protocol, Synchronous Step-Up converter, lithium battery charge management, batteries indication, along with other functions. It’s compatible with DCP identification, BC1.2, Apple, and Samsung mobile phones; providing a complete power solutions for mobile power.

The upper right next to the USB port is the CWQ 3002f intelligent recognition chip. CW3002F is a high-performance solution for fast charging mechanisms to speed up the charging time. The CW3002F Embedded Automatic charger detects its compliant USB battery charging specification (BC) version 1.2, and Apple/Samsung chip resistor mode. This feature means that the CW3002F supports fast charging for the majority of smartphones and tablets. With the SOT23 – 5 encapsulation, the CW3002F delivers the best performance as well as a cost-effective solution. The lower right corner is the 8205+DW01 constitutes lithium protection.

R2R inductance.

Fully dismantled.

The Conclusion

The JDB Quick Charge 3.0 Power Bank does have a capacity of 20000mAh and comes with  phone bracket for convenience and comfort. The power bank is equipped with a Ying Ji chip IP5318 and compatible with DCP identification, BC1.2, Apple, and Samsung QC3.0 protocols. The mobile power bank is crafted with percision and offers in-place protection for the batteries. When all things are said, the new JDB power bank is pretty hard to beat.