Charmast 20000mAh Portable Charger with 4 Built-in Cables - Travel

In this review the Charmast 20000mAh portable charger stands out as a travel-ready, high-capacity external battery for people who need reliable multi-device power on the go. The single biggest reason to buy is its combination of large 20000mAh capacity and integrated cables - you get the equivalent of a small charging station without carrying extra cords. For frequent travelers, commuters, and families who share devices, the pack delivers plenty of runtime and the convenience of built-in connectors in a surprisingly slim package.

Key Features

• 20000mAh capacity: Provides several full charges for phones and multiple charges for tablets so devices stay powered for days during travel or extended use.
• Built-in cables: Four integrated cables eliminate the need to carry separate cords and reduce the clutter of tangled chargers while still supporting multiple device types.
• Six outputs: Allows charging up to six devices at once so a phone, tablet and accessories can be topped up simultaneously in shared settings.
• 20W PD fast charging: Delivers faster replenishment for phones and compatible tablets so you spend less time waiting and more time using your device.
• LED display: Clear numeric battery percentage reporting removes guesswork and helps plan when to recharge the power bank.
• Ultra-compact design: Slim dimensions and light weight for a 20000mAh pack make it easier to carry in a bag or large pocket compared with bulkier alternatives.

Who It's For

This power bank is ideal for travelers, remote workers, and families who need to charge several devices without hauling separate chargers; the built-in cables and six outputs are especially useful for shared hotel rooms, flights, and car trips. It also suits heavy device users who want multi-day backup for phones and a tablet.

Those who prioritize the absolute lightest possible pocket charger or need the fastest high-watt laptop charging should look elsewhere; while the 20W PD is strong for phones and tablets, it is not intended as a laptop replacement for high-watt notebooks.

Pros & Cons

Pros

• High usable capacity that can recharge most phones multiple times without access to an outlet.
• Built-in cable options reduce the need to pack extra cords and make charging multiple device types convenient.
• Clear LED percentage display gives precise remaining battery information so you know when to recharge the pack.
• Slim and relatively light for a 20000mAh battery, making it more portable than many competitors.

Cons

• Customers note the unit is heavier than a small pocket charger, which is expected for a true 20000mAh capacity.
• Recharge time varies by input used and can take several hours depending on the method.

Specifications

Capacity	20000mAh
Fast Charge Output	20W PD
Outputs	6 outputs (including USB-A and cable outputs)
Built-in Cables	4 multi-interface built-in cables
Recharge Methods	4 inputs: USB-C, USB-A cable input and others as built-in options
Dimensions	Approx 6.33 x 2.85 x 0.74 in
Weight	About 0.73 lb

Our Verdict

The Charmast 20000mAh portable charger is a strong value for travelers and multi-device households who need dependable multi-charge capacity and built-in cables. Its slim design, numeric LED display, and six-output flexibility make it practical for trips and daily heavy use; choose it when you want a balance of high capacity and convenience rather than the absolute lightest pocket option.

Frequently Asked Questions

How many times will it charge a phone?
It can recharge a modern phone several times; customer examples include around three full charges for an iPhone model and multiple charges for mid-range Android phones.

How long does the power bank take to recharge?
Recharging time varies by input: roughly 6 hours via the built-in USB-C port and longer via other inputs such as USB-A.

Can it charge multiple devices at once?
Yes, the unit supports charging up to six devices simultaneously using its combination of outputs and built-in cables.