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 A1610 Battery (PowerCore 5K) offers an estimated 2,750mAh~3,250mAh to power devices.

How can I estimate the number of charges for my device?

To estimate charging cycles, use these formula:

Why does charging stop at 80%?

Your iPhone may automatically stop charging at 80% to protect its battery from overheating, as part of iOS 17's thermal management strategy. Charging will resume once the device cools down. Moving it to a cooler spot can help speed up this process.

Why is my phone overheating?

It's normal for the power bank to reach temperatures between 98-118°F when the ambient temperature is 77°F. Rest assured, this device meets international safety standards for safe operation.

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Anker Power Bank, 621 Magnetic Battery (MagGo), 5000mAh Magnetic Wireless Portable Charger with USB-C Cable, Only Compatible with iPhone 16/16 Plus/16 Pro/16 Pro Max, iPhone 15/14/13/12 SeriesClimatePartner certified

Anker Power Bank, 621 Magnetic Battery (MagGo), 5000mAh Magnetic Wireless Portable Charger with USB-C Cable, Only Compatible with iPhone 16/16 Plus/16 Pro/16 Pro Max, iPhone 15/14/13/12 SeriesClimatePartner certified

Product ID: 699101995

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Details

Connector type
USB Type C
Brand
Anker
Battery capacity
5000
Colour
Black
Special feature
Slim

📏Compact & lightweight design

🔋5000mAh powerhouse

🧲Ultra-strong magnetic grip

Description

⚡ Snap, Charge, Go — Power that sticks with you!

READY OUT OF THE BOX - Includes 60cm USB-C cable and backed by a 24-month warranty for worry-free use.
SEAMLESS COMPATIBILITY - Optimized exclusively for iPhone 12 through 16 series for flawless wireless charging.
MAGNETIC SNAP PRECISION - Ultra-strong magnets ensure perfect alignment—no more frustrating wireless disconnects.
POCKET SIZED POWERHOUSE - Slim, lightweight design fits seamlessly with your iPhone for on-the-go charging.
MINI CELL TECH EFFICIENCY - Advanced MiniCell tech delivers full charging power with fewer components, making it smaller than ever.

The Anker 621 Magnetic Battery (MagGo) is a 5000mAh portable wireless charger designed exclusively for iPhone 12 to 16 series. Featuring Anker’s MiniCell technology, it delivers full charging power in a compact, lightweight form factor. Its ultra-strong magnets ensure perfect alignment and a secure attachment, eliminating wireless charging interruptions. Comes with a USB-C cable and a 24-month warranty, making it the ultimate on-the-go power solution for busy professionals.

Specifications

Unit Count	1.0 Count
Cable Length	0.45 Inches
Item Dimensions L x W x Thickness	4.13"L x 2.62"W x 0.45"Th
Item Weight	5 Ounces
Battery Cell Type	Lithium Polymer
Color	black
Warranty Type	Limited
Recommended Uses For Product	Iphone
Charging Time	24 Hours
Compatible Devices	Magsafe, iPhone 15/15 Pro/15 Pro Max, iPhone 14/14 Pro/14 Pro Max, iPhone 13/12 Series
Is Electric	No
Portable	No
Voltage	5 Volts
Power Source	Battery
Number of Ports	1
Connector Type Used on Cable	USB Type C
Battery Capacity	5000
Additional Features	Wireless Charging