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 (Power Bank Capacity × 0.65) ÷ Device Battery Capacity ≈ Number of Charges. For instance, charging a 3,000mAh device using a 20,000mAh power bank would offer approximately 4.33 charges.

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.

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

Help Track order

Account Cart

Power Bank, 20,000mAh Portable Charger with Built-In USB-C Cable, 87W Max Fast Charging Battery Pack, For MacBook, iPhone 17/16 Series, Samsung, Switch, and More

Product ID: 724099698

Details

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

⚡87W max fast charging

🔋20,000mAh high capacity

🔌Built-in USB-C cable

Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.

VT24995

Duties & taxes included

In stock

Sold byAmazon VanuatuDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Vanuatu.

Secure transaction

Description

⚡ Stay powered, stay ahead — the ultimate fast-charge companion for the modern pro.

INTEGRATED USB C CABLE - Say goodbye to cable clutter with a built-in USB-C cable that endures 10,000+ bends for reliable, on-the-go charging.
MULTI DEVICE CHARGING HUB - Simultaneously power up to three devices with smart power distribution, including 65W to a single device for ultra-fast top-ups.
MASSIVE 20 000 M AH CAPACITY - Keep your devices juiced for days with enough power to deliver over 4 full charges to your smartphone—travel-ready and airline approved.
POWER UP AT LIGHTNING SPEED - 87W peak power lets you charge a 14" MacBook Pro to 50% in under 40 minutes—because waiting is so last decade.
FAST RECHARGE LESS DOWNTIME - Recharge your power bank fully in just 1.5 hours with a 65W charger—because your hustle never stops, and neither should your power.

The Anker Power Bank 20,000mAh delivers ultra-fast 87W charging with a built-in USB-C cable, enabling rapid power-ups for MacBooks, iPhones, Samsung devices, and more. Its high-capacity battery supports multiple device charges, while durable design and fast recharge times keep you connected and productive wherever you go.

Specifications

ASIN	B0CXDXP8VR
Amperage	3.25 Amps
Antenna Location	Laptop, Phone, Tablet
Battery Capacity	20000 Milliamp Hours
Battery Cell Type	Lithium Polymer
Battery Weight	288 Grams
Best Sellers Rank	#26 in Mobile Phones & Communication Products ( See Top 100 in Mobile Phones & Communication Products ) #4 in Mobile Phone Portable Power Banks
Brand	Anker
Color	Black
Compatible Devices	Laptop, Macbook, iPhone, Samsung, Huawei and More
Compatible Phone Models	iPhone 15 Series, Samsung, Switch, and More
Connector Type	USB-C1+USB-A1+Built-in USB C Cable
Country of Origin	China
Customer Reviews	4.6 4.6 out of 5 stars (6,641)
External Testing Certification	ANATEL：02386-25-16934
Global Trade Identification Number	00194644043711
Is Electric	No
Is Product Cordless	No
Item Dimensions	15.7 x 7.3 x 2.6 centimeters
Item Dimensions L x W x Thickness	15.8L x 7.4W x 2.6Th centimeters
Item Weight	0.95 Pounds
Manufacturer	Anker
Mfr Part Number	A1383011
Model Number	A1383
Number of Batteries	1 Lithium Metal batteries required. (included)
Number of Items	1
Number of Outlets	3
Number of Ports	3
Other Special Features of the Product	Built In Cable, Digital Display, Fast Charging, Over Charging Protection, Short Circuit Protection
Output Wattage	87 Watts
Portable	No
Power Source	Battery
Rapid Charging Performance	52% in 30 Minutes
Reusability	Rechargeable
UPC	194644043711
Unit Count	1 Count
Voltage	5 Volts
Warranty Description	12

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anjali K.

The product quality is outstanding. Exactly what I needed for my work.

1 month ago

Farhan Q.

The delivery time was excellent, and the packaging was secure.

2 months 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.

Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.

VT24995

Duties & taxes included

In stock

Sold byAmazon VanuatuDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Vanuatu.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Fatima A.

Best international shipping I've ever tried. Worth every penny!

3 days ago

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

View all Trustpilot reviews