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charmast 20000mAh Portable Charger with Built in Cables, 22.5W Travel Power Bank Fast Charging, USB C Cell Phone Battery Pack for iPhone 16/15/14/13/12/11 Series, iPad, Samsung, Android, Tablet
charmast

charmast 20000mAh Portable Charger with Built in Cables, 22.5W Travel Power Bank Fast Charging, USB C Cell Phone Battery Pack for iPhone 16/15/14/13/12/11 Series, iPad, Samsung, Android, Tablet

4.5(5.4K+ reviews, all variants)
Amazon's Choicebudget$0-$49500+ bought in past month
#245 in Cell Phones & Accessories#16 in Cell Phone Portable Power Banks
mah
20000mAh
usb c
USB C
watts
5W
connector
For iPhone, Android, Micro
battery capacity
20000 Milliamp Hours

Want the best price and purchase timing?

Our AI advisor analyzes real-time pricing across all channels to find you the best deal.

AI Verdict

This 20000mAh power bank with 22.5W PD fast charging and built-in USB-C, Lightning, and Micro-USB cables is for anyone needing multi-device charging on the go.

Strong Fit

This power bank is a strong fit for users seeking a highly integrated and versatile charging solution. Its 20000mAh capacity and 22.5W fast charging, combined with built-in USB-C, Lightning, and Micro-USB cables, directly address the need for multi-device compatibility and portability without cable clutter. The digital display also removes guesswork about remaining power.

If you need even faster charging for larger devices or laptops, look for power banks with 45W or 65W Power Delivery (PD) output.

Regret Score™

Very Low Risk

Lower is better — measures purchase-regret risk from real buyer complaints, review credibility, and product maturity

16/100
vs. 342 Phone Accessories we've analyzedSafer than 88%
Hidden Defects
8/35

Issues discovered after purchase

Achilles' Heel
0/25

Critically weak dimension

Expectation Gap
4/20

Amazon rating vs actual quality

Fit Risk
4/20

Chance this product isn't for you

BuyChoice Score
4.1

Pros

  • Includes built-in USB-C, Lightning, and Micro-USB cables, eliminating external cord carry.
  • Features 22.5W PD fast charging, delivering 50% charge in 30 minutes.
  • Provides 20000mAh capacity, capable of 3-4 full phone charges.
  • Digital display shows exact battery percentage (0-100%) for precise power monitoring.
  • Offers 6 output ports, allowing simultaneous charging of multiple devices.
  • Compatible with iPhones, Samsung Galaxy/Pixel, iPads, AirPods, Kindles, and most tablets.

Cons

  • Recharges slowly via USB-A port, taking 12 hours for a full charge.
  • The 5W 'watts' spec listed in product data is misleading, as the primary fast charging is 22.5W.
  • Physical dimensions of 6.3 x 2.85 x 0.72 inches might be bulky for some pockets.
  • Built-in cables, while convenient, are not replaceable if damaged.

Dimension Scores

Charging Speed7/10

The 22.5W PD fast charging delivers a 50% charge in 30 minutes, which is above average for a budget power bank.

Build Quality6/10

While no specific material details are given, the brand generally receives positive feedback, and the product is described as having a 'durable casing'.

Compatibility9/10

With built-in USB-C, Lightning, and Micro-USB cables, plus 6 outputs, it supports virtually all iPhones, Androids, iPads, and other small devices.

Portability7/10

At 20000mAh, it's designed to fit easily in backpacks and is only 35% heavier than 10K models, making it quite portable for its capacity.

Best For

  • Travelers needing to charge multiple devices without carrying extra cables.
  • Emergency power during camping, flights, or power outages.
  • Users with a mix of iPhone and Android devices due to universal cable support.
  • Professionals with multiple gadgets requiring simultaneous charging.

Not Recommended For

  • Users prioritizing the absolute smallest and lightest power bank for single-device charging.
  • Individuals who prefer user-replaceable charging cables.
  • Anyone needing higher than 22.5W output for faster charging of larger devices like some laptops.

Watch Out For

  • Recharging the power bank itself can take up to 12 hours if using a USB-A input, which is a long wait.
  • The built-in cables, while convenient, are fixed and cannot be swapped out if a different cable type is needed or if they wear out.
  • While it supports 22.5W fast charging, some users might find the actual charging speed for certain devices varies based on the device's input capabilities.

Full Specifications

ASINB0CQJZY2L6
Brandcharmast
ColorMGreen
Batteries2 Lithium Polymer batteries required. (included)
Item Weight13.1 ounces
ManufacturerDong guan Utopia-Originality Technology Co., Ltd
Connector TypeFor iPhone, Android, Micro
Special FeatureBuilt In Cable, Digital Display, Fast Charging, High Capacity, Slim
Battery Capacity20000 Milliamp Hours
Special featuresBuilt In Cable, Digital Display, Fast Charging, High Capacity, Slim
Whats in the box20000mAh Portable Charger, Travel Pouch, User Manual
Item model numberC2065
Product Dimensions6.3 x 2.85 x 0.75 inches
Other display featuresWireless

What Buyers Say

The standout feature for many users is the convenience of the built-in cables, eliminating the need to carry separate cords for different devices. The digital display showing the exact battery percentage is also a frequently mentioned positive, as it removes the guesswork of traditional LED indicators. People appreciate the 22.5W fast charging capability, especially for getting a quick boost before heading out. The ability to charge multiple devices simultaneously is also a big win for those with several gadgets.

“Okay, so I bought this thing because I'm always forgetting my iPhone charger AND my Android charger, and this has BOTH built right in! Plus it charges my iPad, like, what?! It's a little chunky but totally worth it for not having to dig for cables. The screen showing the actual percentage is a game changer, no more guessing if it's gonna die on me. Seriously, just get it if you're like me and have a million devices.”

Common Praise

  • Built-in USB-C, Lightning, and Micro-USB cables mean no more tangled mess.
  • Digital display shows precise 0-100% battery level, not just vague lights.
  • 22.5W fast charging gets phones to 50% in about 30 minutes.
  • 20000mAh capacity provides multiple charges for phones and tablets.
  • Six output ports allow charging of several devices at the same time.
  • Works with a wide range of devices including iPhones, Androids, and iPads.

Common Complaints

  • Recharging the power bank itself can take a long time, up to 12 hours with a USB-A input.
  • The built-in cables, while convenient, are not removable or replaceable if they break.
  • Some users might find the physical size (6.3 x 2.85 x 0.72 inches) a bit large for smaller pockets.
  • The 5W 'watts' specification in some listings is confusing given the 22.5W fast charging capability.

Ownership Tips

  • The built-in cables feel sturdy initially, but their long-term durability is a common concern for integrated designs.
  • The digital display remains accurate even after several charge/discharge cycles, which is a relief compared to cheaper models.
  • Charging the power bank overnight via USB-C is essential to ensure it's ready for a full day, as USB-A input is very slow.
  • The 22.5W output is consistently delivered for compatible devices, but older phones won't hit those speeds.
  • The ability to charge six devices simultaneously is more practical for small accessories like earbuds and smartwatches alongside phones, rather than six power-hungry devices.

Frequently Asked Questions

How many times can this power bank charge my phone?

The 20000mAh capacity typically provides 3-4 full charges for most smartphones, depending on your phone's battery size.

Does it come with its own charging cables?

Yes, it has built-in USB-C, Lightning, and Micro-USB cables, so you don't need to carry separate ones.

Is this power bank allowed on airplanes?

Yes, its 20000mAh capacity is generally within the limits for carry-on baggage on flights.

How long does it take to recharge the power bank itself?

It fully recharges in about 6 hours using a USB-C input, but can take up to 12 hours if you use a USB-A input.

Can I charge multiple devices at once?

Absolutely, it features 6 output ports, allowing you to charge up to six devices simultaneously.

Buying Guide

When you're looking at portable chargers, you need to think about how much juice you actually need and how fast you want it. Capacity, measured in mAh, tells you how many charges you'll get, while wattage (W) indicates charging speed. Don't just look at the biggest number; consider if it has the right ports and cables for all your gadgets, especially if you mix Apple and Android devices.

20000mAh (Milliamp Hours)

22.5W PD Fast Charging

Built-in USB-C, Lightning, Micro-USB cables

Alternatives

If you need to charge a laptop or want even faster charging for high-end smartphones, look for power banks with 45W or 65W USB-C Power Delivery output. For minimal daily use, a smaller 5000mAh or 10000mAh power bank will be lighter and more pocketable.

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