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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🔋 Stay powered, stay unstoppable — the ultimate travel essential for the always-on professional.

TRIPLE DEVICE CHARGING - Distribute 87W across three devices simultaneously; keep your iPhone, Samsung, and Switch juiced on the go.
AIRLINE APPROVED POWERHOUSE - 20,000mAh capacity that’s TSA-friendly—travel smarter without sacrificing power.
BUILT IN CABLE ZERO HASSLE - Integrated USB-C cable with 10,000+ bend durability means no more tangled mess or forgotten cords.
POWER UP AT LIGHTNING SPEED - Charge a 14" MacBook Pro to 50% in under 40 minutes—because waiting is so last decade.
RAPID RECHARGE READY WHEN YOU ARE - Fully recharge the power bank in just 1.5 hours with a 65W charger—minimal downtime, maximum freedom.

The Anker Power Bank packs a robust 20,000mAh lithium polymer battery with an 87W max output distributed across three ports, including a built-in USB-C cable engineered for durability. It rapidly charges high-demand devices like MacBook Pros and iPhone 15/16 series, is airline-approved, and recharges itself in just 1.5 hours, making it the perfect companion for busy professionals who refuse to be tethered to outlets.

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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.

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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.

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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.

€ 118.36

Duties & taxes incl.

Finlandstore

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TrustScore 4.5 | 7,300+ reviews

Imran F.

Very reliable shop with genuine products. Will definitely buy again!

2 weeks ago

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

3 weeks 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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