Charmast C2065 20,000mAh 22.5W Power Bank

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Product guide

Charmast C2065 20,000mAh 22.5W Power Bank

Charmast C2065 is a 20,000mAh power bank with four built-in cables, a digital display and a stated maximum output of 22.5W. Its integrated leads reduce the need to carry separate cables, while its listed weight and dimensions are worth considering if you want a particularly compact charger.

At a glance

Four built-in cables cover USB-C, iPhone, Micro USB and USB-A connections, according to the listing.
The listing claims up to 22.5W output and says compatible phones can reach 50% in about 30 minutes.
A digital display shows remaining charge, and the listing says it supports low-current mode for small devices.

Price

£22.09Save 15%

Reference price: ~~£25.99~~

Price checked: 12 Nov 2026

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Pros and cons

Pros

Integrated cables and additional ports can reduce the number of separate leads needed when charging several devices.
20,000mAh stated capacity and a charge display help when planning longer days away from a mains socket.
The stated kit includes a travel pouch.

Cons

At 340 Grams, it may feel bulky to buyers seeking a very light pocket charger.
The manufacturer says it is not compatible with laptops. Its 22.5W maximum output is aimed at phones and smaller devices rather than laptop charging.

Technical specifications

16 specifications

Identity
Brand	charmast
Model	C2065

Power and battery
Power configuration	Corded Electric
Capacity	20000 Milliamp Hours
Maximum output power	22.5W
Voltage	5 Volts
Amperage	3 Amps
Battery cell type	Lithium Polymer
Rechargeable	Rechargeable

Connections and features
Cables and ports	4 Built-in Cables:USB-C,for iPhone,Micro USB,USB-A, 4 Ports:USB-C1+USB-A 2+Micro USB *1
Number of ports	6
Special features	Built In Cable, Digital Display, Fast Charging, Over Charging Protection, Short Circuit Protection
Compatible devices	Smartphone, Smartwatch, Tablet

Dimensions and installation
Dimensions listed	16 x 7.3 x 1.9 centimetres
Weight listed	340 Grams
Colour	Black-20000mAh

What to know before buying

The manufacturer says carry-on air travel is allowed but advises against packing it in checked baggage. It also says some warmth during charging is normal and to stop use if temperatures exceed 45°C (113°F).

Listing details to confirm

The listing says the fixed USB-A cable can recharge the power bank when connected to a wall adapter. It claims charging up to six devices at once, but the separate connector details specify four built-in cables and four ports while another field lists six ports. The two listed dimensions also differ, so check the selected listing for the exact configuration and size. The claimed 50% phone charge in about 30 minutes applies to compatible phones, and actual charging depends on the device and conditions.

What’s in the box

Included

Power adapter ×1
Travel pouch, quantity 1
User manual ×1

Who is it for?

A good fit for

People who want several common charging leads built into one power bank.
Phone, smartwatch or tablet users who value a charge-level display and a higher stated capacity for travel or commuting.
Buyers who can accommodate a 340-gram charger and do not need laptop charging.

Less suited to

Laptop users seeking a compatible external charger.
Buyers prioritising the lightest or smallest possible power bank.

Charmast C2065 20,000mAh 22.5W Power Bank · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.4 / 5 · 5,184 ratings

5 stars74%74%
4 stars12%12%
3 stars5%5%
2 stars2%2%
1 star7%7%

Customer feedback describes the built-in cables and ability to charge multiple devices as convenient, with some finding the bank useful for repeated phone charging. Experiences are not uniform: reports include breakage after around 200 days, a size that felt too bulky, and mixed views on charging speed, including slower recharging of the bank itself. These points matter if you prioritise portability, durability or quick replenishment, even though the listing states 20,000mAh capacity and up to 22.5W output.

Positive themes

Customers highlight the practical built-in cables and convenience for charging multiple devices.
Some customers describe it as handy to carry and report that it can charge a phone multiple times.

Negative themes

Some customers report that the unit broke after around 200 days.
Some customers find it too bulky for their intended use.

Mixed feedback

Feedback on charging speed is mixed, including praise for device charging and reports that recharging the power bank takes a while.
Reported battery experience varies, with some saying it holds charge for weeks and others raising concerns about battery life.

Frequently asked questions

How many devices can the Charmast C2065 charge at once?

The listing claims up to six devices, but its connector details describe four built-in cables and four additional ports, while a separate field lists six ports. Check the selected listing to confirm the exact configuration.

Can it charge a laptop?

The manufacturer says it is not compatible with laptops and recommends a 30W or higher laptop charger instead.

Can I take it on a plane?

The listing says it is allowed in carry-on baggage and should not be packed in checked baggage.

What is included?

The stated included-components list names one portable charger, one travel pouch and one user manual.