Realpower PB-10000C 10000mAh

Test 08/2019

  • Realpower PB-10000C 10000mAh	 - testing
  • Realpower PB-10000C 10000mAh	 - front
  • Realpower PB-10000C 10000mAh	 - boxed
  • Realpower PB-10000C 10000mAh	 - detail
  • Realpower PB-10000C 10000mAh	 - detail2
  • Realpower PB-10000C 10000mAh	 - realpower-heat
  • Realpower PB-10000C 10000mAh	 - realpower-messung
Test seal: Realpower PB-10000C 10000mAh	, Rating 6.9

last modified: 11.10.2019, 10:20

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All rating criteria details:

Usable capacity 45%
Range of functions 25%
Workmanship 15%
Size capacity ratio 15%
Tested by: Philipp


Product tester


The RealPower 10.000 mAh has 3 outputs and can, therefore, load up to three devices simultaneously. It can also be charged and discharged simultaneously. However, the power bank heats up strongly during discharge and the long charging time is also noticeable negatively. Despite overload protection, this power bank allows a significantly too high output current, which can lead to long-term damage to the device. Unfortunately, this product mainly stands out negatively due to these characteristics.


  • 3 outputs
  • Charge status is shown on the display


  • Strong heating
  • Long charging time
  • Overload protection intervenes late
  • Voltage drop during discharge

360° View

Satisfactory power bank with problems with overload protection and voltage drop during discharge.

Special Feature

The RealPower 10.000 mAh is the only power bank I tested in the category with 10.000 mAh that has three outputs and can charge three devices simultaneously.


With its cuboid design, the RealPower 10.000 mAh can yet be held with one hand. In addition, it has a rubber coating and looks well produced. The outputs and inputs are located on the upper side and the display to indicate the charge level is located on the front.


The power bank has 2 USB outputs (1 A and 2.1 A) and one USB-C output (2.1 A). The RealPower 10.000 mAh can charge three devices in parallel and can be charged and discharged simultaneously. The maximum output current at all outputs together is 3.4 A according to the manufacturer. Either the USB-C (2 A) or the Micro-USB input (2 A) can be used as input for charging.


Setup of the capacity measurement
Setup of the capacity measurement

Since power banks never have their full capacity available, I measured the usable capacity of the RealPower 10.000 mAh by discharging it via a resistor and recording the power. For this test I have set a current of 2 A. The measured capacity is about 8.200 mAh. This corresponds to 82 percent of the stated capacity of the manufacturer.

You can see the power output during the discharge in the following graph:

Power during discharge

It is noticeable that performance begins to decrease after one hour. The reason for this is that the applied voltage decreases. Towards the end this is only about 4.4 V. This is the lower limit of the permissible supply voltage, because according to the USB specification, the voltage must be between 4.45 V and 5.25 V. This is the lower limit of the permissible supply voltage.

You can see the detailed voltage curve during discharge here:

Voltage during discharge

Charging time

discharge heat generation
Heat production during discharging

To measure the charging time, I connected the power bank to a power supply that can deliver the maximum charging current of 2 A. The power bank is connected to a power supply that can supply the maximum charging current of 2 A. The power bank is connected to the power supply of the Power bank. The charging time of the RealPower 10.000 mAh is about 7:40 hours. The charging current is approx. 1.6 A.

Heat production

Both during charging and discharging, I noticed substantial warming of the power bank with our thermal imaging camera. The higher temperature is reached during discharging and amounts to approx. 49 °C. I measured a temperature of 42.5 °C during charging.

Short-circuit behaviour and overload protection

A short circuit can damage the power bank and in the worst case lead to a fire. Such a short-circuit can be caused by a defective cable, for example. In order to investigate the behavior of the power bank in such a case, I intentionally short-circuited it. The RealPower 10.000 mAh switches off immediately and is still functional after the short circuit.

I also investigated the behavior of the RealPower 10.000 mAh in case of an overload. First I increased the current consumption of a connected consumer until the power bank switches off.

  • The USB output, which is designed for 1 A, switches off at 2.4 A. The power consumption of the power bank is increased until the power bank switches off. The supply voltage drops down to 3.5 V
  • The USB output, designed for 2.1 A, switches off at 3.2 A. The supply voltage drops down to 4 V.
  • The USB C output designed for 2.1 A, switches off at 3 A. The USB C output designed for 2.1 A switches off at 3 A. The supply voltage drops to 3.7 V.

These currents are not yet harmful to the power bank, as it is designed for a total of 3.4 A, but the supply voltage of only 4 V is too low for charging.

More problematic, however, is that the RealPower 10.000 mAh allows a current of 4.8 A with several connected consumers. This current, which is 1.4 A higher than the maximum current of 3.4 A specified by the manufacturer, can cause long-term damage to the power bank.

Drop test

Falling to the ground is no problem to the power bank RealPower 10.000 mAh. I dropped the power bank in our office from a height of one meter onto the hard carpet. On the outside, there was a small scratch in the rubber coating and no damage and the power bank still worked perfectly.

We have evaluated about 25 reviews on the Internet. In summary, it can be said that about 75 percent of buyers are satisfied (4 stars) or even very satisfied (5 stars). Partially (2 stars) or completely dissatisfied are about 25 percent of the users. The average score at the time of the evaluation was 4.0 out of 5 stars.

Summary: 75% positive and 25% negative ratings

The following points were positively noted:

  • Can charge three devices at the same time
  • Digital energy display

The following points were noted negatively:

  • The long loading time of the power bank
  • Bad instructions
Manufacturer Realpower
EAN 4040895004307
Scope of delivery 2 x charging cables (USB -> microUSB, USB -> USB - C; 20 cm x 20 cm), manual
Quality impression Good
Inlets 1x Micro-USB (5V/2,1A), 1x USB-C (5V/2,1A)
Outlets 1x USB (5V/2,1A), 1x USB(5V/1A), 1x USB-C (5V/2,1A)
Charge indicator Display - charge level indicator
Capacity (manufacturer) 10.000 mAh
Capacity (measured) 8.200 mAh
Charching time 7:40 hrs
Additional warranty 12 months
Height 10,9 cm
Width 7,5 cm
Depth 2,2 cm
Weight 230 g
Simultaneous charging and discharging Yes
Loading several devices in parallel Yes, 3
Button Yes
Packaging Informative, magnetic closure
Quality of instructions Short, understandable
Manual language GER, EN, FR
Range of functions
Size capacity ratio
Usable capacity

Our winner

All products

Check our main page to get an overview of all tested products within this category.

Overview: Power Banks with 10.000 mAh

How do you like this product?


How is the charge status of the power bank displayed?
The charge level is shown on a display.
Which devices can I charge with the power bank?
The power bank can be used to charge all mobile phones and other devices that require 5 V to charge.
Which cables are included in the scope of delivery?
A 21 cm USB to Micro-USB cable and a 21 cm USB-C to USB-C cable are included.
How long does it take to charge the power bank?
The charging time is approx. 7:40 hours.
What is the function of the button?
The button is used to display the charge level.
Is there a flashlight integrated into the power bank?
Can the power bank be used while it is loading?


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