Rank #5 in Best 20000mAh Power Bank: 10 Ranked by Real Charge Counts
NOBIS 45W 20,000mAh Power Bank, 4 Outputs
Price and rating as shown on Amazon when we collected them. Both change.
The NOBIS Power Bank Fast Charging 45W 20000mAh is the fifth entry in this guide. At £26.34 it carries a 4.3 rating from 5,335 ratings, and its pitch is speed: 45W over USB-C with PD 3.0 and QC 3.0, enough to take an iPhone 15 Pro from 0% to 60% in 30 minutes, or a MacBook Pro 14-inch from 0% to 47% in the same half hour.
The listing's own specification fields tell a smaller story. Voltage is given as 5 Volts, and Amperage and Output Current as 3 Amps. Five times three is 15W, not 45W, and nothing in the listing explains where the other 30W would come from. On weight the numbers are easier to believe: 392 g item weight and 376.2 g battery weight, which places it near the heavy end of this guide's range rather than anywhere near the 40 g battery one listing here claims for the same capacity. Everything on this page is taken from the Amazon listing, not from testing we carried out ourselves.
How those 5,335 ratings break down
An average hides its own shape. This is the spread behind the 4.3 stars.
Specification
Exactly as published on the Amazon listing, field for field.
| Price | £26.34 |
|---|---|
| Rating | 4.3 out of 5, from 5,335 ratings |
| Claimed capacity | 20,000mAh |
| Advertised charging | 45W maximum via USB-C, plus PD 3.0 and QC 3.0 |
| Voltage | 5 Volts (as listed) |
| Amperage and output current | 3 Amps (as listed) |
| Battery weight | 376.2 Grams (as listed) |
| Ports | 4 — 2 USB-A and 2 USB-C (as listed) |
What buyers actually say
Quoted from customer reviews on Amazon
Verified purchase“really good, highly quality charger. For reference, i use this mainly for my iphone 14 pro max with about 70% battery life, and ti fully charge it from like below 20% to 100% takes about 30-40% of the power banks battery life which is really good. I really like the inbuilt cables as well, makes it easier to carry around”
Verified purchase“I think it's quality as it's 5 socket ports power display fast charging and lasts about 12 to 13 hours but is very heavy”
What it is up against
The rivals it was ranked against in Best 20000mAh Power Bank: 10 Ranked by Real Charge Counts.
Questions people ask
How fast does the NOBIS power bank charge a phone?
The listing claims 45W over USB-C, with an iPhone 15 Pro going from 0% to 60% in 30 minutes and a MacBook Pro 14-inch from 0% to 47% in 30 minutes.
Does the 45W claim match the other numbers in the listing?
No. The same listing gives Voltage as 5 Volts and Amperage and Output Current as 3 Amps, which multiply to 15W. The listing does not explain the difference.
How long does the NOBIS take to recharge?
The listing states 2 hours, using the USB-C port, which it says accepts 45W maximum input.
How heavy is the NOBIS 20,000mAh power bank?
The listing gives 392 g as item weight and 376.2 g as battery weight.
How many devices can it charge at once?
Four. The NOBIS has 2 USB-A and 2 USB-C ports, and the listing says 4 devices can share the power supply without queuing.
Can I take it on a plane?
The listing describes the 20,000mAh pack as airline approved. That is the listing's claim; we have not verified it independently.
Comments
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