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.

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Power Bank, 20,000mAh Travel Essential, Built-in USB-C Cable

Product ID: 636770769

Details

Brand
Anker
Colour
White
Connector type
USB Type C
Special feature
Built In Cable
Voltage
5 Volts

⚡87W max output for rapid charging

🔋20,000mAh high-capacity battery

🔌Built-in USB-C cable, 10,000+ bend lifespan

€ 105.93

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Sold byAmazon CroatiaDelivered 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 Croatia.

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Description

🔋 Stay powered, stay ahead — never miss a moment!

ALL DAY BATTERY BACKUP - Massive 20,000mAh capacity keeps your devices juiced through back-to-back meetings and travel days without a hitch.
BUILT IN CABLE ZERO HASSLE - Integrated USB-C cable engineered for 10,000+ bends means no more tangled cords or forgotten chargers.
POWER UP AT LIGHTNING SPEED - Distribute up to 87W across 3 devices, with 65W single-device turbocharge—50% MacBook Pro charge in under 40 minutes.
FAST RECHARGE MINIMAL DOWNTIME - Recharge the power bank fully in just 1.5 hours with a 65W charger—because your time is money.
TRAVEL READY AIRLINE APPROVED - Slim, lightweight design (439g) fits perfectly in your carry-on and meets airline regulations for worry-free charging on the go.

The Anker Power Bank packs a powerful 20,000mAh lithium-ion battery with an 87W max output, enabling rapid charging of multiple devices simultaneously. Featuring a durable built-in USB-C cable and a sleek, travel-friendly design, it recharges fully in 1.5 hours and is airline-approved, making it the ultimate companion for busy professionals on the move.

Specifications

ASIN	B0CXDMYS8C
Amperage	24 Amps
Antenna Location	Phone
Battery Cell Type	Lithium Ion
Battery Charge Time	1.5 Hours
Battery Weight	288 Grams
Battery cell composition	Lithium Ion
Best Sellers Rank	22 in Mobile Phone Portable Power Banks
Brand	Anker
Brand Name	Anker
Colour	White
Compatible Devices	Smartphone, iPhone 16 Series, iPhone 15 Series, iPhone 17/iPhone 17 Pro/iPhone 17 Pro Max/iPhone Air
Compatible Phone Models	Audiovox CDM3000
Connector Type	USB Type C
Connector type	USB Type C
Country of Origin	China
Customer Reviews	4.6 out of 5 stars 9,734 Reviews
Is Electric	No
Is Product Cordless	No
Item Dimensions	15.7 x 7.3 x 2.6 centimetres
Item Dimensions L x W x Thickness	15.7L x 7.4W x 2.6Th centimetres
Item Weight	0.97 Pounds
Manufacturer	Anker
Manufacturer Part Number	A1383021
Model Number	A1383
Number of Batteries	1 Lithium Metal batteries required. (included)
Number of Items	1
Number of Ports	2
Other Special Features of the Product	Built In Cable, Digital Display, Fast Charging, Over Charging Protection
Portable	Yes
Power Source	Corded Electric
Product Warranty	18-month
Reusability	Rechargeable
Special feature	Built In Cable, Digital Display, Fast Charging, Over Charging Protection
UPC	194644043728
Unit Count	1.0 count
Voltage	5 Volts
Warranty Type	No Warranty

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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.

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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.

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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.

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€ 105.93

Duties & taxes included

In stock

Sold byAmazon CroatiaDelivered 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 Croatia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anita G.

Good experience, but the tracking updates could be better.

2 months ago

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

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