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 to14000mAh 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.

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Anker Power Bank, 20,000mAh Travel Essential Portable Charger with Built-in USB-C Cable, 3-Port 87W Max Fast Charging Battery Pack, for MacBook, iPhone 16/15 Series, Samsung, Switch, and MoreClimatePartner certified

Anker Power Bank, 20,000mAh Travel Essential Portable Charger with Built-in USB-C Cable, 3-Port 87W Max Fast Charging Battery Pack, for MacBook, iPhone 16/15 Series, Samsung, Switch, and MoreClimatePartner certified

Product ID: 627188297

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Details

Connector Type
Built-In C +
Brand
Anker
Battery Capacity
20000 Milliamp
Color
Black
Special Feature
Built In Cable

⚡87W max power output

🔋20,000mAh high-capacity battery

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

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Description

⚡ Stay charged, stay unstoppable — power that keeps pace with your hustle!

BUILT IN USB C CABLE - Never fumble for cables again—durable, integrated USB-C cable designed for 10,000+ bends.
TRIPLE DEVICE CHARGING - Simultaneously power up to three devices, sharing 87W intelligently for ultimate convenience.
TRAVEL READY POWERHOUSE - 20,000mAh capacity approved for airline travel keeps you connected wherever you go.
FAST RECHARGE LESS WAIT - Refuel the power bank fully in just 1.5 hours with a 65W charger—stay ahead of the pack.
POWER UP AT LIGHTNING SPEED - Charge your MacBook Pro to 50% in under 40 minutes with a massive 87W output.

The Anker 20,000mAh Power Bank delivers a robust 87W max output across three ports, including a built-in USB-C cable engineered for durability. Perfect for professionals on the move, it rapidly charges laptops, smartphones, and tablets, supports airline travel, and recharges itself in just 1.5 hours, ensuring you never miss a beat.

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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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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

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Item Dimensions L x W x Thickness	6.2"L x 2.89"W x 1.02"Th
Item Weight	440 Grams
Battery Cell Type	Lithium Polymer
Color	black
Warranty Type	Limited
Recommended Uses For Product	Outdoor
Compatible Devices	Laptop, Tablet, Smartphone
Is Electric	No
Portable	No
Voltage	5 Volts
Power Source	Battery
Number of Ports	2
Connector Type Used on Cable	USB Type C
Battery Capacity	20
Additional Features	Digital Display, Over Charging Protection, Fast Charging, Built In Cable

Anker Power Bank, 20,000mAh Travel Essential Portable Charger with Built-in USB-C Cable, 3-Port 87W Max Fast Charging Battery Pack, for MacBook, iPhone 16/15 Series, Samsung, Switch, and MoreClimatePartner certified

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