Why is my power bank providing fewer charges than expected?

The capacity reduction during charging is due to a 30% to 45% energy loss in the battery cells and conversion circuitry. Therefore, a fully charged Anker A1383 Power Bank (PowerCore 20K) offers an estimated 11,000mAh to14,000mAh to power devices.

How can I estimate the number of charges for my device?

To estimate charging cycles, use this formula:

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

It depends on the charger's power and the ambient temperature. The A1383 model, when using a 30W PD charger at 77°F (25°C), takes about 4.5 hours to recharge.

Deliver to Bolivia

For best experience Get the App

DOWNLOAD THE APP

WE SOURCE ITEMS FROM

UAE
UK
India
USA
Japan
KOREA

Customer Services

About Us

Customer Support

Anker Laptop Power Bank, 20,000mAh Portable Charger with Built-In USB-C Cable, 87W Max Fast Charging Battery Pack, 2 USB-C and 1 USB-A, For MacBook, iPhone 16/15 Series, Samsung, Huaiwei, and More

Anker Laptop Power Bank, 20,000mAh Portable Charger with Built-In USB-C Cable, 87W Max Fast Charging Battery Pack, 2 USB-C and 1 USB-A, For MacBook, iPhone 16/15 Series, Samsung, Huaiwei, and More

4.6/5

Product ID: 724099698

Secure Transaction

Details

Connector type
USB C Cable
Brand
Anker
Battery capacity
20000 Milliamp
Colour
Black
Special features
Built In Cable

⚡87W max power output

🔋20,000mAh high capacity

🔌Built-in USB-C cable

Description

⚡ Power your hustle, anywhere, anytime.

INTEGRATED USB C CABLE - Say goodbye to cable clutter with a durable built-in cable that lasts 10,000+ bends 🔌
TRIPLE DEVICE CHARGING - Simultaneously power 3 devices with smart distribution up to 65W per device for ultimate multitasking
TRAVEL READY RELIABLE - Airline-approved, fast recharge in 1.5 hours, plus overcharge and short circuit protection for peace of mind
MASSIVE 20 000 M AH CAPACITY - Keep all your devices juiced through long workdays and travel without worry 🔋
POWER UP AT LIGHTNING SPEED - Charge your MacBook Pro to 50% in under 40 minutes with 87W max output ⚡

The AnkerLaptop Power Bank delivers a robust 20,000mAh capacity with ultra-fast 87W charging, featuring a built-in USB-C cable and multiple ports to power your MacBook, iPhone 15/16 series, Samsung, and more. Designed for professionals on the go, it offers rapid charging, durable construction, and travel-friendly safety certifications to keep you connected and productive without compromise.

Reviews

4.6

All from verified purchases

A**N

Good Product

Good product. Very fast charging.

12.06.2025

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

Bs.1306

Duties & taxes incl.

Boliviastore

Free Shipping

with PRO Membership

Free Returns

30 daysfor PRO membership users

15 dayswithout membership

Secure Transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

View all Trustpilot reviews

Product Dimensions	15.8 x 2.6 x 7.4 cm; 430.91 g
Batteries	1 Lithium Metal batteries required. (included)
Item model number	A1383
Special features	Built In Cable, Digital Display, Fast Charging, Over Charging Protection, Short Circuit Protection
Color	Black
Item Weight	431 g

Anker Laptop Power Bank, 20,000mAh Portable Charger with Built-In USB-C Cable, 87W Max Fast Charging Battery Pack, 2 USB-C and 1 USB-A, For MacBook, iPhone 16/15 Series, Samsung, Huaiwei, and More

Details

Description

Specifications

Have a Question? See What Others Asked

Reviews

Common Questions