Second Chance BlueBuilt Power Bank 20,000 with Fast Charging 45W

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Specifications

Product information

Condition of this Second Chance product

Used for up to 30 days
Returned product in opened original packaging
Complete with undamaged accessories/parts

Everything on Second Chance

Pros and cons

According to our power bank expert

For multiple days: you can fully charge your smartphone 4 times with this power bank.
Charge superfast: you can charge your devices superfast with this power bank.
Also for laptops: with this power bank, you can charge smartphones, tablets, or laptops.
Not for your pocket: this power bank doesn't fit in your pocket, but you can take it with you in a backpack.
No wireless charging: this power bank doesn't charge your smartphone wirelessly.

Description

Charge your smartphone multiple times with the BlueBuilt Power Bank 20,000 with Fast Charging 45W. This power bank charges your smartphone 4 times. That makes it useful to take with you for a long weekend away. The 45W output lets you quickly charge Android smartphones and some tablets. The power bank automatically delivers less power if your device asks for it. You can also charge small laptops and Chromebooks. That means you can use it for laptops with a USB-C port.

Tips for using this product

Included by default

Storage bag
USB-C to USB-C cable (50cm)
USB-C to USB-C cable (20cm)

Key specs

	Battery/battery capacity	20 Ah
	Fast charge type	Power Delivery 3.0
	Recommended for product type	E-readers, Laptops with USB C connector, Smartphone, Smartwatch, Tablet
	Type of USB port	Standard USB-A, USB-C
	Easy to take with you	Average
	Power	45 W
	Number of USB ports	3
	Type of USB cable included	USB-C to USB-C

Show all specifications

Reviews

Rating

5 stars

4 stars

3 stars

2 stars

1 star

Most helpful reviews

Review is 10 out of 10.

Solid pack, suitable for power-hungry laptops

Maximum capacity suitable for aircraft (100Wh)
Can charge and power a USB-C and USB-A device simultaneously
Handy display with charging time, predicted time remaining, and output power
Not super compact or light (1kg), but all chargers with this capacity have this.

Can power my recent, powerful laptop for about 3 (power-hungry) to 6 hours (average).

The form factor is a bit of a brick, which can stand flat or on its back, and has a handy display that shows how much power is going out of or into each port.

Specs say 140W: I managed to get up to 100W from 1 port, which was also pretty much the maximum my laptop draws; this was possible without the pack getting very hot. With standard use, this adds something like 5 hours of runtime to a power-hungry (20W) laptop.

I am not sure if the 140W is a maximum of 100W per port or total per port, but I also haven't found a power-hungry enough device that can draw 140W. In any case, this pack would last a maximum of 45 minutes.

All in all, a solid pack that can ensure my laptop lasts a good workday.

Review by:
Johan
Date:
22 June 2026
Translation:
Automatically translated from Nederlands

Review is 10 out of 10.

Private label price, but competes with the big players

Stays cool
Delivers continuous full power without faltering
High efficiency (91% to 93% net usable when using a laptop)
The included USB-C cable is limited to 60W (3A)

I don't find reviews like "Works well" and "Can charge my phone often" very useful. That is why I decided to really put the power bank to the test, using a USB tester and an electronic load.

The power banks have now been charged and discharged three times, and I can report that these power banks compete with the A-brands when it comes to achieving the promised capacity, as well as the promised output.

If you drain the power bank at a rate of 100W, you get about 85-88Wh out of the 99.9Wh in the cells. The fact that this power bank consistently delivers 100W from 100 to 0 percent is an achievement in itself, but the efficiency with which it does so is truly above expectations for a house brand power bank.

With a somewhat more realistic load of ~45W, you squeeze 91-93Wh out of these guys. That is more than 90% efficient; perfectly fine. I bought the Duo Pack; they performed within 2-3% of each other, which is otherwise normal.

Really the only thing I have to comment on: next time, please include a 100W/140W (5A/28V with E-marker) cable instead of a 60W cable. The power bank cannot be charged at full speed with the included cable.

Review by:
Wouter
Date:
16 September 2026
Translation:
Automatically translated from Nederlands

Review is 10 out of 10.

Great product

Fits in your pocket, charges quickly
It is ideal that you can see how much capacity is left on the side.

I bought this power bank to film or take photos outside the car with my dashcam.

Contrary to what Coolblue claims about it not fitting in your pocket, the device fits perfectly in your pocket.

Unless you are a resident of Madurodam; in that case, no, it won't fit in your pocket.

I myself am not from Madurodam; I am a real person and have no problem with it.

Moreover, the product charges quickly.

It comes with a 3-year warranty.

Review by:
PdTr
Date:
16 June 2026
Translation:
Automatically translated from Nederlands

Specifications

Product

Product
	Product number	959639
	Manufacturer code	BBPB4520PR
	Brand	BlueBuilt
	Processing of your defect	Via Coolblue
	Old product returned for free

Key properties

Key properties
	Number of charges smartphone	4
	Battery/battery capacity	20 Ah
	Power	45 W
	Easy to take with you	Average
	Fast charge type	Power Delivery 3.0
	Recommended for product type	E-readers, Laptops with USB C connector, Smartphone, Smartwatch, Tablet
	Type of USB port	Standard USB-A, USB-C
	Number of USB ports	3
	Type of USB cable included	USB-C to USB-C

Physical properties

Physical properties
	Height	12 cm
	Width	6,9 cm
	Depth	3,26 cm
	Weight	314 g
	Color	Black
	Material	Plastic
	Water-resistant
	Shockproof

Charging properties

Charging properties
	Battery technology	Lithium-ion
	Wireless charging
	Power bank chargeable via fast charging

Slots

Slots
	Lightning connector
	Number of USB-C ports	2
	Output or Input USB-C port	Both
	Power USB-C port	45 W
	Fast charging USB-C port
	Type of fast charging USB-C port	Power Delivery 3.0
	Output or Input second USB-C port	Output
	Power second USB-C port	30 W
	Fast charging second USB-C port
	Type of fast charging second USB-C port	Power Delivery 3.0
	Number of female standard USB-A ports	1
	Power standard USB-A port	22,5 W
	Fast charging standard USB-A port
	Type of fast charging basic USB-A port	Quick Charge 3.0
	A / C connection

Extra functionalities

Extra functionalities
	Solar cell
	Battery level indicator
	Flashlight

Connectivity

Connectivity
	Type of included second USB cable	USB-C to USB-C

Compatibility

Compatibility
	Made for brand	Apple, Huawei, Motorola, Samsung, Sony, Universal, Xiaomi

This is the one

Second Chance BlueBuilt Power Bank 20,000 with Fast Charging 45W

Review is 8,9 out of 10, based on 15 reviews.

Returned · Undamaged

Used for up to 30 days
Returned product in opened original packaging
Complete with undamaged accessories/parts

BlueBuilt Power Bank 20,000 with Fast Charging 45W

anything for a smile

Choose your Second Chance version

Returned · Undamaged

Product information

Condition of this Second Chance product

Pros and cons

Description

Tips for using this product

Included by default

Key specs

Reviews

Rating

Most helpful reviews

Solid pack, suitable for power-hungry laptops

Private label price, but competes with the big players

Great product

Specifications

Product

Key properties

Physical properties

Charging properties

Slots

Extra functionalities

Connectivity

Compatibility

Related products

This is the one

Returned · Undamaged

Product information

Condition of this Second Chance product

Pros and cons

Description

Tips for using this product

Included by default

Key specs

Reviews

Rating

Most helpful reviews

Solid pack, suitable for power-hungry laptops

Private label price, but competes with the big players

Great product

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