Best 4000mAh Power Banks of 2026

Mike Davis Avatar
Mike Davis
Last Updated: Jan 18, 2026

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4000mAh Power Banks are a must-have accessory for anyone who relies heavily on their mobile devices. These power banks are compact and portable, making them perfect for on-the-go charging. With a capacity of 4000mAh, they are capable of providing multiple charges to most smartphones and tablets. The sleek and stylish design makes them a great addition to any travel bag, purse, or backpack. They also come equipped with safety features such as overcharging and short-circuit protection, ensuring the safety of both the user and their device. Overall, 4000mAh Power Banks offer a convenient and reliable solution for staying connected while on the move.

At a Glance: Our Top Picks

INIU MegaPower 22.5W Power Bank Cover #TOP 1
INIU MegaPower 22.5W Power Bank
ftb score rating icon 9.9
INIU 20000mAh 65W Power Bank Cover #TOP 2
INIU 20000mAh 65W Power Bank
ftb score rating icon 9.8
INIU 45W 10000mAh Power Bank Cover #TOP 3
INIU 45W 10000mAh Power Bank
ftb score rating icon 9.6

Top 10 4000mAh Power Banks

INIU MegaPower 22.5W Power Bank

Black
Mini Size
INIU MegaPower 22.5W Power Bank Cover
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 iPad etc

The INIU Power Bank is designed for fast and efficient charging. With its advanced 22.5W output, you can charge your phone to 71% in just 30 minutes, perfect for those times when you're in a hurry. It also charges your iPad Pro up to 34% in the same time frame, ensuring you stay connected without long wait times. The 2024 version features a versatile USB-C port for both input and output, making it compatible with the latest devices. Plus, you can charge three devices at once, making it ideal for sharing power with friends and family.

What We Like
Fast charging capabilities
Multiple device charging
USB-C input and output
Compact and portable design

INIU 20000mAh 65W Power Bank

P62-E1
Black
Mini Size
INIU 20000mAh 65W Power Bank Cover
INIU Power Bank, 20000mAh 65W Ultra Compact USB C Laptop Portable Charger, PD QC Fast Charging 3-Output External Battery Pack for Laptop MacBook iPad Tablet Steam Deck iPhone 17 16 15 Pro Samsung S24

The INIU 65W Power Bank offers a safe and reliable charging experience, trusted by millions worldwide. It uses high-quality materials and comes with a 3-year warranty, giving you peace of mind. Thanks to its innovative TinyCell and HyperStack technology, this compact charger packs a powerful 20000mAh capacity without the bulk. You can quickly charge your MacBook Air or iPhone in just 25 minutes, making it perfect for busy users who need fast power on the go. Plus, it supports a wide range of devices, from smartphones to smaller gadgets like earbuds and smartwatches, so you can keep all your gear charged with one device.

What We Like
Safe fast charging
Compact high capacity
Quick dual-device charging
Wide device compatibility
3-year warranty
#TOP 3

INIU 45W 10000mAh Power Bank

P41L
Black
INIU 45W 10000mAh Power Bank Cover
INIU 45W Power Bank, Fast Charging Portable Charger with Built-in USB C Cable, 10000mAh Small Type C Powerbank, Battery Pack for iPhone 17 16 15 14, iPad, Samsung S25 S24 etc Travel Camping Essentials

The INIU 45W Power Bank is designed to give you fast and safe charging on the go. With its 45W output, you can quickly charge your latest iPhone or Samsung device, saving you valuable time. The built-in USB-C cable means you won’t have to carry extra cords, making it perfect for travel or daily use. Despite its 10,000mAh capacity, this power bank is slimmer and lighter than many others, so it’s easy to carry without feeling bulky. Plus, it’s built with high-quality materials and backed by a 3-year warranty, giving you peace of mind with every charge.

What We Like
Fast 45W charging
Built-in USB-C cable
Compact and lightweight design
High-quality materials
3-year warranty

INIU 20000mAh Portable Charger

P51L
Black
INIU 20000mAh Portable Charger Cover
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 iPad etc

The INIU Portable Power Bank is designed for ultimate convenience and efficiency. With its built-in USB-C cable, you'll never have to worry about forgetting your charging cable again. This power bank is remarkably compact yet powerful, featuring a 20,000mAh capacity that can recharge your iPhone 15 up to 3.6 times. You can enjoy fast charging, bringing your iPhone 15 to 65% in just 25 minutes, making it perfect for busy days. Plus, the ability to charge up to three devices simultaneously means you can keep your phone, tablet, and other gadgets powered up at the same time.

What We Like
Compact and lightweight design
Built-in charging cable
Fast charging capabilities
Simultaneous multi-device charging

DAOLOT 50000mAh Fast Charging Power Bank

DAOLOT
Black
DAOLOT 50000mAh Fast Charging Power Bank Cover
Power Bank Fast Charging 50000mAh - 22.5W Portable Charger USB C Quick Charge with 4 Outputs & 3 Inputs LED Display Huge Capacity External Battery Pack for iPhone, Samsung, iPad etc Black

The DAOLOT Fast Charge Power Bank offers a huge 50000mAh capacity, letting you charge your iPhone 14 up to 15 times or your Samsung S20 over 13 times, making it perfect for long trips or outdoor activities. Its 22.5W USB-C port supports the latest fast-charging protocols, so you can quickly power up your devices—like charging an iPhone 15 from 20% to 60% in just 20 minutes. With multiple inputs (Micro, Lightning, USB-C) and four output ports, you can easily charge several devices at once or use different cables without hassle. Plus, it’s built with safety features like overcharge and short circuit protection, giving you peace of mind while charging on the go.

What We Like
Massive 50000mAh capacity
22.5W fast charging USB-C
Multiple input and output ports
Comprehensive safety protections

INIU 140W Power Bank 27000mAh

BI-B64
Black
Classic Size
INIU 140W Power Bank 27000mAh Cover
INIU 140W Power Bank, 27000mAh High Capacity Laptop Portable Charger, USB C Tablet Powerbank, Smart Digital Display Phone Charge for iPhone 17 16, Samsung, iPad, MacBook, Camping, Outdoor, Travel etc

The INIU Power Bank offers impressive features for all your charging needs. With a massive 27,000mAh capacity, you can recharge multiple devices on the go without worrying about running out of battery. The 140W PD 3.1 Super-Fast Charging capability allows you to quickly power up high-demand devices like laptops and tablets, making it perfect for busy users. Additionally, with three ports available, you can charge multiple devices simultaneously, ensuring that everything is ready when you are. The smart LED power display keeps you informed of the battery life, so you’ll never be caught off guard.

What We Like
Fast charging capabilities
Large battery capacity
Multiple device charging
Smart LED display
#TOP 7

Anker Zolo Power Bank , 45W Max Fast Charging, 20,000mAh Battery Pack, Dual Built-in USB-C Cables, USB-C&A Port

A1681
Black
Built-in C cable*2
Anker Zolo Power Bank , 45W Max Fast Charging, 20,000mAh Battery Pack, Dual Built-in USB-C Cables, USB-C&A Port Cover
Anker Zolo Power Bank (2025 Upgraded Version), 45W Max Fast Charging, 20,000mAh Battery Pack, Dual Built-in USB-C Cables, USB-C&A Port, for iPhone 17/16 Series, Galaxy, MacBook, and More

Features
45W High-Speed Charging: Enjoy More Time On The Go Without Waiting Around For Your Devices To Charge With 45W Power. Supports Up To 40W Fast Charging For The iPhone 17 Series Via The Built‑in Cable Or The USB‑C Port. 45W Samsung Fast Charging Is Only Available When Using The USB-C Port (not The Built-In Cable).
Dual Built-In USB-C Cables: Charge Effortlessly With Dual Built-In USB-C Cables. They Are Tested To Last Over 10,000 Bends For Long-Lasting Use.
What You Get: Anker Zolo Power Bank (20K, 45W, Built-In Dual USB-C Cables), Welcome Guide, 18-Month Warranty, And Our Friendly Customer Service.
Charge 4 Devices At Once: Enjoy Multi-Device Charging Anywhere With Two Built-In USB-C Cables, A USB-C Port, And A USB-A Port.
20,000mAh Portable Power: Perfect For Travel, This Compact Power Bank Measures 4.72 × 2.89 × 7.24" And Weighs Only 12.85 Oz. It Provides 4 Full Charges For An iPhone 16, Keeping Your Adventures Powered Without The Bulk.

INIU Power Bank, 25000mAh/65W USB C Laptop Portable Charger

BI-B63
Black
Classic Size
INIU Power Bank, 25000mAh/65W USB C Laptop Portable Charger Cover
INIU Power Bank, 25000mAh 100W USB C Laptop Portable Charger, PD QC Fast Charging 3-Output Battery Pack, Travel Charger for Laptop MacBook iPad Tablet Steam Deck iPhone 17 16 15 14 Pro Samsung S25 etc

INIU Power Bank is a 25000mAh/65W portable charger with PD QC Fast Charging 3-Output External Battery Pack for Laptop MacBook Dell XPS iPad Tablet iPhone 14 13 12 Pro Max Samsung S21 Google, etc. It features 65W fast charging for all devices, 25000mAh for a week, and charge 3 at once. The power bank is compatible with most laptops, tablets, mobiles, and small devices as AirPods. You get INIU 65W power bank1, USB C to USB C cable1, USB A to USB C cable1, user manual1, travel pouch*1, 30-day money-back guarantee, industry-leading 3-year warranty, and lifetime technical support.

What We Like
Massive 25000mAh battery capacity
65W fast charging for all devices
Charge 3 devices at once
Compatible with most laptops, tablets, mobiles, and small devices as AirPods
Industry-leading 3-year warranty and lifetime technical support
#TOP 9

LOOPEAK Power Bank 50000mAh 22.5W Fast Charging Portable Charger

LOOPEAK
PC3-5
Black
50000mAh
LOOPEAK Power Bank 50000mAh 22.5W Fast Charging Portable Charger Cover
LOOPEAK Power Bank 50000mAh 22.5W Fast Charging Portable Charger, USB C Quick Charge with 3 Outputs & 2 Inputs, LED Display, Huge Capacity External Cell Phone Battery Pack for iPhone, Samsung, iPad

Features
Latest USB C (22.5W) And iOS (20W) Super Fast Charging Power Bank: The Portable Charger Power Bank Usb C Features The Latest Chipset Supporting A Range Of Fast-Charging Protocols, Including PD4.0 And QC4.0. Battery Bank With A Maximum Output Power Of 22.5W And An Input Power Of 18W (Requires Fast Charging Cable And Charging Plug), It Can Charge An iPhone 15 From 0% To 60% In Just 30 Minutes, Up To 3 Times Faster Than Most Traditional Battery Pack Charger Portable
Ultra-High Capacity 50000mAh Power Bank For A Week: The Portable Charger 50000mAh Can Charge An iPhone 15 Up To 12 Times And A Samsung S22 Up To 13.5 Times. Ideal For Camping, Hiking, Fishing, Concerts, Travel, Work, And Other Activities Or Home Emergencies, This Large Capacity Battery Pack Portable Phone Charger Is Perfect For Families Or Individuals With Multiple Devices, Providing A Reliable Power Source Wherever You Go
What You Get: You Will Get Power Bank 50000 mAh*1, Type C Cable*1(Need To Open The Bottom Cardboard), User Manual*1, 18 Months Support. If You Encounter Any Problems About The Phone Charger Powerbank, Please Contact Us In Time, Our Professional Customer Service Team Will Solve It For You Within 24 Hours. (Note: The Battery Pack 50000 mAh May Not Be Allowed On Airplanes; Please Check With Your Airline Beforehand)
Safe And Powerful External Portable Battery Pack: The 50000mAh Battery Bank Includes Premium Battery And Comprehensive Multi-Protection Safety System, Ensuring Safe Charges For Your Devices. Portable Phone Charger Equipped With Smart Chips To Prevent Overcharge, Overvoltage, Overcurrent, High Temperature, And Short Circuits, It Offers Enhanced Protection For You And Your Devices (Note: Charging Automatically Stops After 24 Hours, And You Need To Unplug And Reconnect To Resume Charging)
Multiple Charging Ports - 3 Outputs And 2 Inputs: Cell Phone External Battery Power Bank Fast Charging 3 Devices Simultaneously Via USB1/2 Outputs And A Two-Way Type C Port. Share The Power Quickly With Friends And Family. Portable Charger Usb C Widely Compatible With Smartphones, Tablets, Cameras, Smartwatches, Bluetooth Headsets, And Other USB Devices, Portable Power Bank Supporting Both Micro And USB C Inputs For Flexible Charging Cables (Note: Not Suitable For Laptops)
High Precision LED Digital Display Portable Power Bank: Featuring A High-Precision LED Digital Display, This Portable Battery Charger Provides Accurate Power Readings Down To 1%. Easily Monitor Remaining Battery Life, Ensuring Peace Of Mind While Traveling Or Outdoors. The Battery Pack 50000mAh Weighs 18.72 Oz And Size 1.3 X 2.9 X 6.1 In. Its Design Is Compact And Portable, With A Premium Texture That Ensures Long-Lasting Performance
#TOP 10

CYCYHEAT 4000mAh Battery Pack for Heated Gloves Scarf Socks and Heating Slippers

RTX-DR08
Black
CYCYHEAT 4000mAh Battery Pack for Heated Gloves Scarf Socks and Heating Slippers Cover
CYCYHEAT 4000mAh Battery Pack (DC & USB Port) for Heated Gloves Scarf Socks and Heating Slippers, 5V2A Heated Clothing Replacement Battery Pack

Features
[4000mAh CAPACITY BATTERY] This Power Bank Boasts A 4000mAh Capacity, Providing Up To 6 Hours Of Heating Time For Your Daily Needs. Enjoy 2-6 Hours Of Heat (High 130°F/2 Hours) - (Medium 120°F/4 Hours) - (Low 115°F/6 Hours). It Can Also Serve As An Additional Battery Pack, Allowing You To Extend Your Outdoor Activities While Staying Warm.
[BATTERY PACK For HEATING GLOVES And SOCKS] Experience Continuous And Stable Power Output For Your Heated Clothing With Our Professionally Customized Battery. It's Safe, Reliable, And Compatible With A Range Of Heated Devices Such As Gloves, Scarves, Socks, Slippers, And Heating Coats.
[SAFETY & UL CERTIFICATION] Our Power Bank Has Obtained UL2056 Certification, Ensuring Safety With Features Like Overcharge Protection, Short Circuit Protection, Temperature Control, And More. It Is Permitted For Onboard Use During Flights.
[PORTABLE & MINI] This 5V2A Battery Pack Is Mini-Sized (3.14*1.96*0.78 In), Super Lightweight (0.17 Lbs), And Easy To Carry. Perfect For Travel, This Portable Charger, Weighing Only 80 Grams, Fits Effortlessly Into Pockets, Bags, Handbags, Or Backpacks.
[Brand Supports ] If You Choose Our Products And Encounter Any Problems Or Need Replacement Parts, You Can Contact Us Through Your Amazon Order Details Page (go To Your Orders>Order Problems>Contact Seller). We Will Reply To Your Email And Solve The Problem Within 24 Hours.
Buying Guide Image

How to Select 4000mAh Power Banks: The Comprehensive Guide

Introduction

When it comes to portable power, you need to make sure you have enough charge for all of your devices. Power banks are great for keeping your devices charged when you’re on the go, but with so many options on the market, it can be difficult to choose the right one for your needs. This article will help you decide which 4000 mAh Power Bank is the best for you.

Features to Consider

When choosing a power bank, there are several features you should consider.

Capacity

The capacity of a power bank is measured in mAh (milliampere-hours). The higher the mAh, the more juice it can store and the larger devices that it can charge. 4000 mAh is a great capacity for a power bank as it can charge a typical smartphone 1-2 times and some tablets partially.

Output

The output of a power bank is the amount of power it can output at once, measured in Amps (amperes). Generally, the higher the output, the faster the device will charge. A 4000 mAh Power Bank can usually output 1-2 Amps and is suitable for most devices.

Input

The input of a power bank is the amount of power it can take in to recharge itself, measured in Amps. The higher the input, the faster the power bank will charge itself. Most 4000 mAh Power Banks have an input of 1 Amp.

Number of Ports

The number of ports on a power bank determines how many devices can be charged simultaneously. Most 4000 mAh Power Banks have one or two ports, which is usually enough for most users.

Durability

Durability is important when considering a power bank, as it needs to be able to withstand the wear-and-tear of everyday use. Look for power banks with protective casings, such as rubber or plastic, to ensure that it is well-protected.

Additional Features

Some power banks come with additional features, such as a built-in flashlight or a digital display. These features can be useful, but they are not necessary for most users.

Conclusion

Choosing the right 4000 mAh Power Bank can be a daunting task, but with the right knowledge and features in mind, you can find the perfect one for your needs. Consider the capacity, output, input, number of ports, durability, and additional features to find the right power bank for you.

Frequently Asked Questions (FAQs)

1. How long does 4000mAh power bank last?

A 4000mAh battery life can last up to 4,000 hours, depending on the current required by the object being powered (measured in mA).

2. Is 4000 mAh good for a power bank?

The average battery capacity of a standard smartphone falls below 4,000 mAh. So, a power bank with a 10,000 mAh capacity (actual capacity 6,000-7,000 mAh) is enough to fully charge most handsets at least once and charge small phones like the iPhone 12 mini three times.

3. How many times can a 4000mAh power bank charge?

Don't forget all Power Banks come with a 12month warranty. Holds 4000mAh - enough for up to 1 charges. Fast charge: faster than standard charging, for when time is of the essence.

4. How many hours of charge is 4000mAh?

How long does it take to charge a 4000mAh battery? It takes about 3 to 4 hours to charge a 4000mAh battery.

Editor's Notes

During our 4000mah power bank research, we found 24 4000mah power bank products and shortlisted 10 quality products. We collected and analyzed 191,905 customer reviews through our big data system to write the 4000mah power banks list. We found that most customers choose 4000mah power banks with an average price of $31.26.

The 4000mah power banks are available for purchase. We have researched hundreds of brands and picked the top brands of 4000mah power banks, including INIU, DAOLOT, Anker, LOOPEAK, CYCYHEAT. The seller of top 1 product has received honest feedback from 384 consumers with an average rating of 4.7.

Written by
Mike Davis Avatar

Mike Davis is a professionally trained electrician with six years of working experience in the electronics industry. He has written an array of web and mobile-based articles for e-magazines and blogs. He loves trying out some novel and popular gadgets and his expertise is in the areas of electronics and computers which is built over many years of working and personal experiences.