Charmast C2065 20,000mAh Power Bank, 22.5W

Charmast C2065 is a 20,000mAh portable power bank with four built-in cables, four listed ports and a digital display. The fixed cables reduce the need to carry separate leads, while the listing specifies a maximum output of 22.5W. It is intended for phones and smaller devices, not laptops.

At a glance

Four built-in cable types are listed: USB-C, for iPhone, Micro USB and USB-A.
The listing specifies a 20,000mAh capacity and 22.5W maximum output.
A digital display shows the remaining charge, according to the listing.
The manufacturer says its built-in USB-A cable can recharge the power bank.

Price

£22.09Save 8%

Reference price: ~~£23.99~~

Price checked: 12 Nov 2026

View offer Ahead of Black FridayExplore the selection

Pros and cons

Pros

Built-in cables and additional ports offer several connection options without requiring separate cables for every device.
The digital display makes the remaining charge easier to check than a basic indicator.
The stated capacity is suited to carrying spare charge for phones and smaller devices.

Cons

At 340 grams, it may feel bulky for buyers prioritising a light pocket carry.
The manufacturer says it is not suitable for charging laptops.

Technical specifications

14 specifications

Identity
Brand	charmast
Model	C2065

Power and battery
Capacity	20000 Milliamp Hours
Maximum output power	22.5W
Listed voltage	9 Volts (DC)
Power configuration	Corded Electric
Battery cell type	Lithium Polymer
Rechargeable	Rechargeable

Connections and features
Connector configuration	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	4
Special features	Built In Cable, Digital Display, Fast Charging, Over Charging Protection, Short Circuit Protection

Dimensions and installation
Dimensions listed	16 x 7.2 x 1.9 centimetres
Weight listed	340 Grams

Appearance
Colour	Purple-20000mAh

What to know before buying

The manufacturer states that the four built-in cables and four additional ports can charge up to six devices at once, and that the USB-C and iPhone cables support 20W PD/QC fast charging. Actual charging depends on device compatibility and use. It also advises using low-current mode for headphones and watches, carrying the power bank in hand luggage rather than checked baggage, and stopping use if its temperature exceeds 45°C. The maker says some warmth during charging is normal.

What’s in the box

Included

Power adapter ×1
Travel pouch
User manual ×1

Who is it for?

A good fit for

People who want a portable charger with attached cables for several common connector types.
Travellers and households who may need to top up multiple phones or smaller devices.
Buyers who prefer a numerical battery display over an indicator with a few lights.

Less suited to

Laptop users, since the manufacturer explicitly says this power bank is not compatible with laptops.
People seeking the lightest or least bulky option for everyday pocket carry.

Charmast C2065 20,000mAh Power Bank, 22.5W · 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 highlights the built-in cables, convenience and ability to charge multiple devices as useful. Reports on charging speed and portability are mixed: some praise charging, while others say the power bank takes a while to recharge or feels too bulky. Some also report it held charge for weeks, while others say it broke after around 200 days. These experiences matter for a 340-gram unit designed for phone and small-device charging, but do not establish consistent performance for every buyer.

Positive themes

Customers appreciate the built-in cables and the convenience of 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

Customer reports on charging speed differ, including praise for charging devices and complaints that recharging the power bank takes a while.
Feedback about portability and battery life is mixed.