10 Best Smallest 20000mah Power Bank of 2025

Tested and Reviewed: Top 10 Smallest 20000mah Power Bank deals with expert ratings from 8.1 to a perfect 10

May 2026 Edition

Editor's Choice

9.7

CUKTECH

CUKTECH 45W Power Bank 20000mAh, Portable Travel Charger Built-in USB C Cable, Fast Charging Battery Pack for iPhone 16/15/14/13, iPad, Samsung Galaxy, Google Pixel, Android and More (Gray)

Editor's bottom line:

“This smallest 20000mah power bank is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

45W MAX Super Fast ChargingThe CUKTECH 20,000mAh power bank provides rapid 45W MAX output, swiftly charging devices such as the iPhone 16/15 Pro Max, MacBook Air, and Samsung Galaxy S24 Ultra. This portable charger can charge the Galaxy S24 Ultra to 50% in just 20 minutes.
Built-in USB-C Cable for Fast-ChargingDitch the cable clutter! This power bank features an integrated USB-C charging cord tested to withstand 10,000+, ensuring durability that matches your adventurous lifestyle. It can also serve as a carrying strap for easy portability in backpacks or pockets. Supporting 45W MAX high-speed charging delivers about 50% charge to Galaxy S24 Ultra in under 20 minutes.
Gear Up for Uninterrupted PowerWith a massive 20,000mAh capacity, this portable charger is designed to deliver multiple charges effortlessly. It can juice up your iPhone 15 up to 3.9 times, your Samsung Galaxy S24 Ultra about 2.9 times, and your iPad Air approximately 1.9 times. Perfect for traveling, daily commutes, or emergency backups, this power bank is your go-to energy solution on the go!
Charge 3 Devices SimultaneouslyWith 3 output ports and 2 input ports, this power bank supports charging up to three devices at the same time. It keeps your phone, tablet, and other gadgets fully charged and ready for use anytime. The CUKTECH power bank is certified with UL, CE, CB, FCC, and other safety standards, ensuring a secure and high-performance charging experience.
Weight vs. CapacityWe've Struck the Perfect Balance! Bigger batteries usually mean bulkier and heavier products. CUKTECH integrates high-density, premium lithium-ion polymer cells into its products. These powerhouses ensure exceptional safety and longevity while delivering the precise capacity we promise. Make the smart choicechoose CUKTECH!
Unique Trickle Charging ModeActivate it with a double-click on the button. Ideal for low-power gadgets such as headphones and watches. Without activating this mode, charging at the Type-C and USB-A ports halts in 30 seconds. Once turned on, enjoy 2 hours of continuous trickle charging. To exit, just give the button a single click.

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Picked by 397 people today

9.5

INIU

INIU 20000mAh Laptop Power Bank, Ultra Compact 65W PD Dual Fast Charging Portable Charger, Flight-Safe Battery Pack with USB C Cable for Travel MacBook iPad Tablet Switch iPhone 17 16 Pro Samsung S25

Main Highlights

From INIU--the SAFE Fast Charge Pro: Experience the safest charging with over 38 million global users. At INIU, we use only the highest-quality materials, so we do have the confidence to provide an industry-leading 3-Year iNiu Care.
Market's Smallest 65W 20000mAh: Equipped with iNiu's industry-first high-density TinyCell and groundbreaking HyperStack technology, this power bank breaks the size limits of high-capacity chargers. No more bulky bricks, just compact portability.
Power Ready iPhone & MacBook in 25Mins: A must-have for multi-device users, this power bank provides up to 65W high-speed charging for two devices simultaneously. In just 25 minutes, it can charge your MacBook Air 13" to 41% and iPhone 15 to 56%. It also supports Samsung Super Fast Charging 2.0.
Even Wider Compatibility: Unlike the markets most power banks incapable of charging low-current accessories, INIU PD3.0 Super portable charger can work with not only all the phones, tablets but your smaller devices like AirPods, Bluetooth headphones, fitness trackers, smartwatches, etc.
What You Get: INIU 20000mAh power bank*1, 100W USB-C to USB-C Cable 1ft*1, welcome guide*1, industry-leading 3-Year iNiu Care, plus lifetime technical support.

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9.5

INIU

INIU Mini Portable Charger, Small 45W PD Power Bank, 10000mAh USB C in&Out Fast Charging Pocket Size Battery Pack, Travel Essentials Powerbank for iPhone 17 16 15 14 Pro Air, Xiaomi, Samsung S24 etc

Main Highlights

From INIU - the SAFE Fast Charge Pro: Experience the safest charging with over 38 million global users. At INIU, we use only the highest-grade materials, so we do have the confidence to provide an industry-leading 3-Year INIU Care.
INIU Redefine Smallest 10000mAh: INIUs latest 10,000mAh power bank, featuring the industry-first TinyCell Pro battery, redefines the industry standard for the smallest size. It's 45% smaller than the standard 10,000mAhseeing is believing!
45W Full-Speed Charging Newest iPhone 16 & Samsung S24 : With a maximum output of 45W, it supports PD, QC, and Samsung Super Fast Charging. Enjoy full-speed charging without compromising convenience or speed, whether its the latest iPhone 16 or Samsung S24.
MacBook Charging, Now in Mini: Truly small yet powerfulwhile traditional laptop power banks feel like carrying a brick, our ultra-mini 10,000mAh defies expectations. With 45W output, it can even charge a MacBook Air, delivering 42% charge in just 25 minutesperfect for emergencies without the bulk.
Detachable Lanyard USB C Cable: INIU's power bank features a new detachable lanyard cable design for added convenience. This USB-C to C cable supports both charging and recharging and since it's removable, you can easily use it with other power banks or devices.
Power for Days 10000mAh: If you're looking for a power bank that covers daily use, short trips, and business travel, 10,000mAh is the perfect choice. It can charge your iPhone 16 twice, your Samsung S24 1.5 times, and your iPad mini 1.5 times.

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9.2

Aaoyun

Aaoyun Portable Charger Power Bank, 20000mAh 22.5W PD Fast Charging Powerbank with Built-in USB C Cable, External Phone Battery Pack for iPhone 17/16/15 Samsung S24 Android etc

Main Highlights

Massive 20000mAh Capacity: This portable charger, equipped with a built-in USB-C Cable, boasts an impressive 5-7 days of battery life. It fully charges for an iPhone 17/16 up to 4.5 times and for a iPad Pro 12.9" up to 1.2 times, making it ideal for travelers, business professionals, campers, and outdoor adventurers.
22.5W PD Super Fast Charging 63% in 30 Mins-- This power bank charges for iPhone 17 to 63% in 30 minutes (3x faster than 5V/2.1A chargers). Metal casing actively dissipates heat to maintain full-speed chargingno slowdowns over time like plastic portable chargers.
Aerospace Metal Case Cool & Unbreakable at 0.6--CNC-machined aluminum alloy dissipates heat 40% faster than plastic rivals. At just 0.6-inch thick and 6.8oz, this portable charger is thinner than for iPhone 16 Pro yet survives drops with 15-layer safety protection.
Ultra-Portable & Durable Design: Weighing only 11.53 oz, the Aaoyun power bank features a built-in 9.8-inch detachable USB-C cable that's both convenient and incredibly durable, capable of enduring over 10,000 bends. With a recharge time of 7 hours and dimensions of 4.48" x 2.64" x 1.07", it's easy to carry anywhere.
Built-in Cable This 20,000mAh portable charger features a built-in Type-C cable, compatible with most cellphones and laptops. This compact power bank is widely compatible with the iPhone series (like for iPhone, iPad, AirPods), Android devices (like for Samsung, Google Pixel, Realme, Oppo, Vivo, LG, Motorola), and other electronics like small fans, heating vests, and smart

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9.0

INIU

INIU 20000mAh Power Bank, Small Portable Charger, 45W PD Fast Charging Battery Pack with Build in USB-C Cable, Travel Phone Charger for iPhone 17 16 15 14 Air Samsung S25 S24 Google iPad Xiaomi, Black

Main Highlights

From INIU--the SAFE Fast Charge Pro: Experience the safest charging with over 38 million global users. At INIU, we use only the highest-grade materials, so we do have the confidence to provide an industry-leading 3-Year INIU Care.
45W Full-Speed Charging for iPhone 16 & Samsung S25: Delivering up to 45W output, this power bank supports PD, QC, and other fast-charging protocols. Charge your iPhone 16 to 70% in just 25 minutes, or your Samsung S25 Ultra to 80%.
New-Gen Ultra-Compact 20,000mAh: Powered by the industry-first high-density TinyCell battery, this compact power bank defies size limits. Enjoy high capacity without the bulk, perfect for on-the-go convenience.
Built-In USB-C Cable, Grab & Go: Never forget your cable again with the built-in USB-C cablecharge with ultimate convenience.
Recharge Once, Power for a Week: Ideal for travelers and outdoor enthusiasts, the 20,000mAh charges your iPhone 16 up to 4 times. Recharge once and power through the week!
Charge 3 Devices at Once: Low on battery? Charge up to 3 devices simultaneouslyyour phone, tablet, and moreall at once.

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8.8

Baseus

Baseus PicoGo AC22 Mini Power Bank, 20000mAh 45W PD Portable Charger Built-in USB-C Cable, Travel Essential Compact Battery Pack, Fast Charging Battery Bank for iPhone 17/16/15 Samsung S25 Pixel iPad

Main Highlights

Small Size, But PowerfulNeed massive battery but hate bulky portable chargers? Featuring advanced stacking technology and high-density battery cells, this mini 45W power bank is 36% smaller than standard 20,000mAh portable chargers. At only 3.7 × 2.7 × 1.2 in and 11 oz. Easily slips into your tiny purse, jeans pocket, or laptop sleeve. Ideal for college campus, business commute, coffee shop work, travel, hiking, camping, always ready to charge your devices anywhere.
45W Turbo Charging for Laptops & PhonesDon't waste hours waiting. It packs enough punch to recharge a iPhone 17 Pro to 50% in just 20 minutes, or charge the Samsung Galaxy S25 Ultra in 27 minutes with this 45W small portable charger. This portable power bank supports PD, QC, and Samsung Super Fast Charging, delivering full-speed charging for the latest iPhone, Samsung, Google devices and more. With dual ports (Built-in Cable + Extra USB-C), power up your laptop and phone simultaneously at full speed.
The Built-in USB-C CableLose or forget your charging cable? Never again. The integrated, ultra-durable (tested to 12,000+ bends) 45W USB-C cable is always attached. Its your charging cord and carrying lanyard in one. Supports fast charging for your MacBook Air, iPad, iPhone, and Samsung devicesideal for on-the-go use, travel, and daily commuting.
Airline Safe & 9-Layer All-Round Safety ProtectionHigh-speed charging generates heat. That's why we've engineered a smarter heat dissipation system and multi-layer protection (Over-current, Over-voltage, Short-circuit). And 20000mAh airline-approved battery, NTC temperature control. Safe for overnight charging and airline travel. Safe for airplane travel, road trips, outdoor use, charge safely without worrying about risks.
All-Day Power SupplyThis compact 20,000mAh portable phone charger can charge your iPhone 17 up to 3.9 times or 1.2 full charges for MacBook Air. Perfect for content creators, vloggers, live streamers, remote workers who need stable outdoor power. Stop hunting for wall outlets and stay in the flow. Enjoy 24-month worry-free guarantee with genuine Baseus quality assurance.

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8.6

INIU

INIU Portable Charger, Smallest 22.5W 20000mAh USB C in & Out Power Bank Fast Charging, PD 3.0+QC 4.0 LED Display Phone Battery Pack Compatible with iPhone 17 16 15 14 Pro Samsung S24 Google, Beige

Main Highlights

From INIU--the SAFE Fast Charge Pro: Experience the safest charging with over 38 million global users. At INIU, we use only the highest-quality materials, and Industry-Leading 3-Year INIU Care, plus Lifetime Technical Support.
Charge Your Phone up to 75% in 30 Mins: With the upgraded 22.5W output plus the latest PD3.0 & QC4+ fast-charge technologies, your phone can be charged at 75% in just 30 minutes.
Charge Your iPad Pro up to 34% in 30 Mins: Most power banks in the market cannot charge your iPad or charge at a snails pace. However, INIU with 22.5W high-speed output can charge all the existing iPad even the newest one at FULL speed.
2024 Version USB C Input & Output: Unlike most chargers featuring a USB C input only, INIU MegaPower 22.5W has a USB-C In & Out port to perfectly fit your new iPhones, iPad and all upcoming USB-C devices.
Charge THREE at Once: With one USB-C port and two USB ports built-in, it can juice up THREE devices simultaneously. Triple-port design allows you to share portable power with families and friends.

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8.3

INIU

INIU Power Bank, Smallest 20000mAh Portable Charger with USB C Cable, 22.5W PD Fast Charging Phone Battery Pack, LED Display Powerbank for Travel Xiaomi iPhone 17 16 15 14 Samsung S25 Google iPad etc

Main Highlights

INIU The SAFE Fast Charge Pro: Experience safe and reliable charging, trusted by over 38 million users worldwide. INIU uses high-quality materials and offers industry-leading 3-Year INIU Care, along with lifetime technical support for added peace of mind.
Charge Your Phone Up to 75% in 30 Mins: With 22.5W output and support for PD3.0 & QC4+ fast-charge technologies, your phone can reach up to 75% charge in just 30 minutes.
Charge Your iPad Pro Up to 34% in 30 Mins: Many power banks on the market charge iPads slowly or struggle to power them at all. INIU's 22.5W high-speed output is designed to efficiently charge a wide range of iPad models, including the latest versions.
2024 Version with USB-C Input & Output: Unlike many power banks that feature USB-C input only, the INIU 22.5W includes a USB-C port that supports both input and outputideal for use with newer iPhones, iPads, and other USB-C devices.
Charge Three Devices at Once: Featuring one USB-C port and two USB-A ports, this power bank can charge up to three devices at the same time. The triple-port design makes it easy to share power with family or friends when on the go.

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8.1

INIU

INIU 45W Portable Charger, Smallest 20000mAh Power Bank with Build in USB-C Cable, Fast Charging USB C in&Out Battery Pack, Travel Phone Charger for iPhone 17 16 15 Air Samsung S25 S24 Google, Green

Main Highlights

From INIU--the SAFE Fast Charge Pro: Experience the safest charging with over 38 million global users. At INIU, we use only the highest-grade materials, so we do have the confidence to provide an industry-leading 3-Year INIU Care.
45W Full-Speed Charging for iPhone 16 & Samsung S25: Delivering up to 45W output, this power bank supports PD, QC, and other fast-charging protocols. Charge your iPhone 16 to 70% in just 25 minutes, or your Samsung S25 Ultra to 80%.
New-Gen Ultra-Compact 20,000mAh: Powered by the industry-first high-density TinyCell battery, this compact power bank defies size limits. Enjoy high capacity without the bulk, perfect for on-the-go convenience.
Built-In USB-C Cable, Grab & Go: Never forget your cable again with the built-in USB-C cablecharge with ultimate convenience.
Recharge Once, Power for a Week: Ideal for travelers and outdoor enthusiasts, the 20,000mAh charges your iPhone 16 up to 4 times. Recharge once and power through the week!

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8.1

INIU

INIU Portable Charger, 20000mAh Small Power Bank, 22.5W Fast Charging Travel Flight Car Family Essentials, for Students Women Men Girls Boys Outdoor

Main Highlights

Market's Smallest, Mega Power: The tiniest 20,000mAh power bank, measuring just 1.94" diagonally yet powerful enough to charge your iPhone 15 four times and Galaxy S23 three times.
Pocket-Sized, Travel Wise: This power bank can easily fit into your pocket, chest bag, and other small bags and can also be taken on a plane, making it perfect for travel.
22.5W Fast Charging: Get 75% power in just 25 minutes. No need to hold the power bank all the time, keep up with your fast-paced life!
Power All Your Devices: Equipped with 2 USB-C input/output ports and 1 USB-A output port, it can power outdoor camping equipment from smartphones to GPS, camping lights, etc. And supports low-current device charging mode.
What You Get: INIU 20000mAh portable charger*1, 0.3M/1ft USB-C to USB-C Cable*1, user manual*1, INIU industry-leading 3-year iNiu Care and lifetime technical support.

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Our Best Overall Choice

Best Choice

9.7

CUKTECH

CUKTECH 45W Power Bank 20000mAh, Portable Travel Charger Built-in USB C Cable, Fast Charging Battery Pack for iPhone 16/15/14/13, iPad, Samsung Galaxy, Google Pixel, Android and More (Gray)

Editor's bottom line:

“This is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

45W MAX Super Fast ChargingThe CUKTECH 20,000mAh power bank provides rapid 45W MAX output, swiftly charging devices such as the iPhone 16/15 Pro Max, MacBook Air, and Samsung Galaxy S24 Ultra. This portable charger can charge the Galaxy S24 Ultra to 50% in just 20 minutes.
Built-in USB-C Cable for Fast-ChargingDitch the cable clutter! This power bank features an integrated USB-C charging cord tested to withstand 10,000+, ensuring durability that matches your adventurous lifestyle. It can also serve as a carrying strap for easy portability in backpacks or pockets. Supporting 45W MAX high-speed charging delivers about 50% charge to Galaxy S24 Ultra in under 20 minutes.
Gear Up for Uninterrupted PowerWith a massive 20,000mAh capacity, this portable charger is designed to deliver multiple charges effortlessly. It can juice up your iPhone 15 up to 3.9 times, your Samsung Galaxy S24 Ultra about 2.9 times, and your iPad Air approximately 1.9 times. Perfect for traveling, daily commutes, or emergency backups, this power bank is your go-to energy solution on the go!
Charge 3 Devices SimultaneouslyWith 3 output ports and 2 input ports, this power bank supports charging up to three devices at the same time. It keeps your phone, tablet, and other gadgets fully charged and ready for use anytime. The CUKTECH power bank is certified with UL, CE, CB, FCC, and other safety standards, ensuring a secure and high-performance charging experience.
Weight vs. CapacityWe've Struck the Perfect Balance! Bigger batteries usually mean bulkier and heavier products. CUKTECH integrates high-density, premium lithium-ion polymer cells into its products. These powerhouses ensure exceptional safety and longevity while delivering the precise capacity we promise. Make the smart choicechoose CUKTECH!
Unique Trickle Charging ModeActivate it with a double-click on the button. Ideal for low-power gadgets such as headphones and watches. Without activating this mode, charging at the Type-C and USB-A ports halts in 30 seconds. Once turned on, enjoy 2 hours of continuous trickle charging. To exit, just give the button a single click.

Show Price

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