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 334 MagGo Battery (PowerCore 10K) offers an estimated 5,500mAh to 7,000mAh to power devices.

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

To estimate charging cycles, use these formula (Power Bank Capacity × 0.55) ÷ Device Battery Capacity ≈ Number of Charges. For instance, charging a 3,000mAh device using a 10,000mAh power bank would offer approximately 2.16 charges.

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Anker Magnetic Power Bank 10,000mAh, Wireless Portable Charger, 20W Fast Charging Battery Pack with USB-C, Magsafe-Compatible with Magsafe,iPhone 16/16 Plus/16 Pro/16 Pro Max, iPhone 15/14/13 Series

Product ID: 563590497

Details

Battery capacity
10000
Brand
Anker
Colour
black
Connector type

⚡20W fast charging power

🔋10,000mAh massive capacity

🧲10N magnetic force for secure snap

Description

🔌 Snap, Charge, and Stay Powered—Because Your Hustle Never Stops!

POWER THAT LASTS ALL DAY - Up to 22 hours of iPhone video playback on a single charge—never miss a moment.
ULTRA PORTABLE ULTRA SLEEK - Compact 4.2×2.7×0.72 inch design fits effortlessly in your pocket or bag—power on the go without bulk.
SNAP CHARGE WITH CONFIDENCE - Strong 10N magnetic grip ensures your power bank stays perfectly aligned for seamless wireless charging.
SIMULTANEOUS CHARGE RECHARGE - Keep your iPhone and power bank charged at the same time—no downtime, just nonstop power.
MAG SAFE COMPATIBLE CASE FRIENDLY - Charge through MagSafe cases without removing them—effortless convenience for your iPhone 12 and newer.

The Anker Magnetic Power Bank 10,000mAh delivers powerful 20W fast charging with a robust 10N magnetic snap, compatible with MagSafe-enabled iPhones from the 12 series through the latest 16 Pro Max. Its slim, lightweight design offers up to 22 hours of extended video playback, supports simultaneous charging of both your phone and power bank, and maintains 90% battery capacity after 20 months. Perfect for professionals who demand reliable, portable power without compromising style or convenience.

Specifications

ASIN	B0C58MS6HF
Battery Capacity	10000 milliamp_hours
Battery Cell Type	Lithium Polymer
Battery Charge Time	22 hours
Battery Weight	200 Grams
Best Sellers Rank	#6,874 in Mobile Phones & Communication Products ( See Top 100 in Mobile Phones & Communication Products ) #155 in Mobile Phone Portable Power Banks
Brand	Anker
Color	black
Compatible Devices	iPhone 16 Pro/ 16 Pro Max/ 16/ 16 Plus/ 15 Pro/ 15 Pro Max/ 15/ 15 Plus/ 14 Pro/ 14 Pro Max/ 14 Plus/ 14/ 13 Pro Max/ 13 Pro/ 13/ 12/ 12 Pro Max/ 12 Pro/ 12 mini/ SE 2022, etc
Compatible Phone Models	iPhone 16 Pro/ 16 Pro Max/ 16/ 16 Plus/ 15 Pro/ 15 Pro Max/ 15/ 15 Plus/ 14 Pro/ 14 Pro Max/ 14 Plus/ 14/ 13 Pro Max/ 13 Pro/ 13/ 12/ 12 Pro Max/ 12 Pro/ 12 mini/ SE 2022, etc
Connector Type	USB-C1+USB-A1
Customer Reviews	4.0 4.0 out of 5 stars (809)
Global Trade Identification Number	00194644137557
Item Dimensions	30 x 60 x 50 millimeters
Item Dimensions L x W x Thickness	10.7L x 7W x 1.8Th centimeters
Item Weight	209 g
Manufacturer	Anker Innovations Limited
Mfr Part Number	A1642
Model Number	A1642
Number of Batteries	1 Lithium Polymer batteries required. (included)
Number of Items	1
Number of Ports	2
Other Special Features of the Product	Short Circuit Protection, Slim, Over Charging Protection, Fast Charging, Wireless Charging, Travel, USB-C Input ：5V ⎓ 3A, USB-C Output ：5V ⎓ 3A / 9V ⎓ 2.22A USB-A Output ：5V ⎓ 2.4A / 9V ⎓ 2A/12V⎓1.5A Total Output：5V ⎓ 2.4A
Portable	Yes
Power Source	Battery
UPC	194644137557
Unit Count	14.2 Grams
Voltage	5 Volts
Warranty Description	1 Year Warranty
Warranty Type	Limited
Wireless Charging Standard	MagSafe

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