Best Power Banks for Small Laptops & Chromebooks (2025)
🔋 Need a compact power source for your small laptop or Chromebook while on the go?
While high-performance gaming laptops require large power banks, most Chromebooks and ultrabooks can run efficiently on smaller, lightweight power banks.
In this guide, we’ve selected the best compact power banks that balance portability, power output, and reliability—keeping your device charged without weighing you down.
While high-performance gaming laptops require large power banks, most Chromebooks and ultrabooks can run efficiently on smaller, lightweight power banks.
In this guide, we’ve selected the best compact power banks that balance portability, power output, and reliability—keeping your device charged without weighing you down.
Versatile Pick
Bulky But Versatile:
Bulky but highly versatile—the Sikon Portable Laptop Power Bank offers a wide range of ports and a large battery capacity, making it an excellent option if you need flexibility in charging multiple devices. Features an AC outlet (100W max.), USB-A ports (2), and USB-C port. 27000 mAh (98 Wh) capacity.
Slim Design
Slim, Powerful, and Perfect for USB-C Charging
If you need high power output without the bulk, the UGREEN Power Bank is a great choice. With 140W output and two USB-C ports, it efficiently powers small laptops, Chromebooks, and other USB-powered devices. 25000 mAh (91 Wh) capacity.
Also Great
Compact, Powerful, and Feature-rich with a Digital Display
The Anker Prime Power Bank offers an impressive 200W output, making it one of the most powerful mid-sized power banks available. If you need fast USB-C charging with an easy-to-read display, this is a premium choice. USB-C ports (2) and USB-A ports (1). 20,000 mAh (73 Wh) capacity.
Figuring Out How Much Power You Need
Step 1: Find Your Laptop’s Maximum Power
Look at the power adapter for your laptop. You’ll see either a large number like 45W or 120W, OR
voltage and amperage ratings like 19.5V===2.31A or 19.5V===6.15A.
Multiply the voltage (V) by the amperage (A) to get the power in watts:
19.5V x 2.31A = 45W
19.5V x 6.15A = 120W
voltage and amperage ratings like 19.5V===2.31A or 19.5V===6.15A.
Multiply the voltage (V) by the amperage (A) to get the power in watts:
19.5V x 2.31A = 45W
19.5V x 6.15A = 120W
Step 2: Find the Power Bank’s Maximum Power Output (Not Power Storage Capacity)
The key spec for compatibility is maximum power output, not capacity.
Even if a power bank has a high capacity like 20,000 mAh (73 Wh) or 27,000 mAh (98 Wh), it may not work for high-performance laptops unless it supports the necessary wattage.
Imagine a water tank — a large tank (capacity) but a weak faucet (output) won’t let you shower.
A power bank must deliver power like a high-pressure jet to run demanding laptops.
Even if a power bank has a high capacity like 20,000 mAh (73 Wh) or 27,000 mAh (98 Wh), it may not work for high-performance laptops unless it supports the necessary wattage.
Imagine a water tank — a large tank (capacity) but a weak faucet (output) won’t let you shower.
A power bank must deliver power like a high-pressure jet to run demanding laptops.
Troubleshooting: When Your Power Bank Won’t Charge Your Laptop
If your power bank isn’t charging your laptop, it may not provide enough power output. Many small laptops and Chromebooks require higher wattage than some power banks can deliver.
💡 Try this first:
– Turn off your laptop and attempt charging—some models require less power when powered down.
– Check power output compatibility—if your power bank doesn’t meet your laptop’s wattage needs, you may need a higher-output power bank.
📌 Need more power? If your laptop requires higher wattage, check out our guide to Power Banks for Gaming Laptops for options that can handle more demanding devices.
💡 Try this first:
– Turn off your laptop and attempt charging—some models require less power when powered down.
– Check power output compatibility—if your power bank doesn’t meet your laptop’s wattage needs, you may need a higher-output power bank.
📌 Need more power? If your laptop requires higher wattage, check out our guide to Power Banks for Gaming Laptops for options that can handle more demanding devices.
How Long Will a Power Bank Run Your Laptop?
Power conversion losses are a normal part of using any power bank, typically reducing efficiency by about 10% to 15%. To estimate how long a power bank will run your device, use this formula:
(Power capacity of power bank (Wh)) x 0.85 / (Device wattage (W))
For example, if your device averages 30 W, a 91 Wh power bank would provide approximately:
91 Wh x 0.85 ÷ 30 W = 2.58 hours of usage.
(Power capacity of power bank (Wh)) x 0.85 / (Device wattage (W))
For example, if your device averages 30 W, a 91 Wh power bank would provide approximately:
91 Wh x 0.85 ÷ 30 W = 2.58 hours of usage.
Product Specs
AC POWER OUTPUT
POWER STORAGE
PORTS
DIMENSIONS, WEIGHT
AC POWER OUTPUT
100W AC POWER STORAGE
27,000 mAh (98 Wh) PORTS
1 x AC outlet (max 100W), 2 x USB 3.0 Type A output (18W)1 x PD Type C output & input (60W)
DIMENSIONS, WEIGHT
7.6 x 3.27 x 3.19 in, 2.03 lbs. 
AC POWER OUTPUT
None POWER STORAGE
25,000 mAh (91 Wh) PORTS
2 x USB Type C PD 3.1 (max. 140W)1 x USB Type A (max. 22.5W)
DIMENSIONS, WEIGHT
7.6 x 3.27 x 3.19 in, 2.03 lbs. 
AC POWER OUTPUT
None POWER STORAGE
20,000 mAh (73 Wh) PORTS
2 x USB Type C (max. 100W each)1 x USB Type A
DIMENSIONS, WEIGHT
5.00 x 2.15 x 1.96 in, 1.06 lbs. TSA Travel Regulations
When traveling, it’s important to note that power banks are subject to strict regulations due to the rare but real risk of flammability. While hazardous items like knives and firearms are allowed in checked luggage in the U.S., power banks generally are not allowed. Instead, these must be stored in carry-on bags and are subject to specific size limits:
– Power banks up to 100 Wh: Allowed in carry-on bags only
– Power banks from 101-160 Wh: Up to two power banks are allowed in carry-on bags with airline approval
(Source: TSA Guidelines)
Before traveling, always check the TSA website, your airline’s latest regulations, and any relevant international guidelines for the countries you’re visiting, as policies can vary and change without notice.
– Power banks up to 100 Wh: Allowed in carry-on bags only
– Power banks from 101-160 Wh: Up to two power banks are allowed in carry-on bags with airline approval
(Source: TSA Guidelines)
Before traveling, always check the TSA website, your airline’s latest regulations, and any relevant international guidelines for the countries you’re visiting, as policies can vary and change without notice.
