OtterboxPower Bank - Fast Charge 20,000 mAh

Large power bank
20000mAh

£45Typical price

Test score

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Are you after a large-sized power bank with plenty of claimed capacity? Then the Otterbox FastCharge 20K could be the one for you. But can it live up to its name as a portable, fast-charging power bank? Not all products in the category actually live up to this claim, so we put it through its paces to find out. Read our full review to see what we thought of it.

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cons

What's included?

What is it?
What’s it like to use?
How well does it perform?
Is there anything else I should know?
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KEY TEST RESULTS
Performance
Ease of use
Eigenschaften

Jun 2024First reviewed by Which?

The overall Which? test score is made up of the following star ratings, all determined by our rigorous lab tests.

How we test portable power bank chargers

4 Jun 2024

Performance

Overall
Capacity - actual v claimed
Efficiency
Power bank charging time
Device charging time

How we test performance

How long does the power bank take to charge? How quickly will it charge your devices? And does it deliver on the amount of power that the manufacturer says it will?

Ease of use

Overall
Portability
Capacity and charging indicators
Sockets

How we test ease of use

Are the sockets well marked and far enough apart? Does the capacity indicator work properly? And how easy is it to carry around? We weight these results so that portability is more important in small power banks, and less important in large power banks

Eigenschaften

How we test features

How many outputs does it have? Does it have any special features that let it charge faster? Does it have wireless? Can you charge this power bank and your devices at the same time?

Allgemein
Typ	Large power bank
Claimed capacity	20000mAh
Width	2.3cm
length	15.9cm
Height	7.9cm
Weight	437g

Eigenschaften
Pass through charging	No
Power delivery	Yes
Wireless charging	No
Display type	4 LED indicators show battery power level
Accessories included	USB A to USB C cable

Power
Power bank charging time
No. smart phone charges possible	4.4204746028633
No. Tablet charges possible	2.2950040727668

Connections
Input 1	USB-C
Input 1 specs	5Vdc - 3A9Vdc - 2A12Vdc - 1,5A
Output 1	USB-C
Output 1 specs	5Vdc - 3A9Vdc - 2A12Vdc - 1.5A
Output 2	USB-A
Output 2 specs	5Vdc - 2.4A9Vdc - 2A12Vdc - 1.5A
Shared output	Yes
Max combined output	15W

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OtterboxPower Bank - Fast Charge 20,000 mAh