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 (Power Bank Capacity x 0.65) + Device Battery Capacity ≈ Numberof Charges For instance, charging a 3,500mAh device using a 20,000mAh povver bank would offer approximately 3.8 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(White)

Product ID: 634058443

Details

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

⚡87W max power output

🔋20,000mAh high capacity

🔌Built-in USB-C cable

485.25 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Stay powered, stay unstoppable – your ultimate travel charge companion!

BUILT IN DURABILITY - USB-C cable endures 10,000+ bends for hassle-free, tangle-free charging on the go.
RAPID RECHARGE CYCLE - Fully recharge the power bank in just 1.5 hours with a 65W charger.
TRAVEL READY BATTERY - 20,000mAh capacity approved for airline carry-on, keeping you powered anywhere.
TRIPLE DEVICE CHARGING - Simultaneously power up to 3 devices, with 65W dedicated to one device.
POWER UP AT LIGHTNING SPEED - Charge a 14" MacBook Pro to 50% in under 40 minutes with 87W output.

The Anker Power Bank packs a massive 20,000mAh lithium polymer battery with an 87W max output, enabling ultra-fast charging for laptops, smartphones, and more. Featuring a built-in USB-C cable designed for durability and convenience, it supports simultaneous charging of three devices and is airline-approved for travel. Compact and lightweight, it fully recharges in 1.5 hours, making it the perfect power solution for busy professionals on the move.

Specifications

ASIN	B0CXDMYS8C
Amperage	24 A
Antenna Location	Outdoor
Battery Capacity	20000 milliamp_hours
Battery Cell Type	Lithium Polymer
Battery Weight	278.8 g
Best Sellers Rank	#121 in Cell Phones & Accessories ( See Top 100 in Cell Phones & Accessories ) #9 in Cell Phone Portable Power Banks
Brand	Anker
Color	White
Compatible Devices	iPhone 16/15 Series, MacBook, Samsung, Switch, and More
Compatible Phone Models	iPhone 15 Series, Samsung, Switch, and More
Connector Type	Built-In C Cable + 1C1A
Customer Reviews	4.5 4.5 out of 5 stars (9,550)
Item Dimensions	6.2 x 2.89 x 1.02 inches
Item Dimensions L x W x Thickness	6.2"L x 2.89"W x 1.02"Th
Item Weight	15.52 ounces
Manufacturer	Anker Innovations Limited
Mfr 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, Fast Charging
Power Source	Battery
Reusability	Rechargeable
UPC	194644043728
Unit Count	1 Count
Voltage	5 volts
Warranty Description	18
Warranty Type	Limited

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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.

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