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 523 Power Bank (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 this formula:

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Power Bank, 533 Power Bank (PowerCore 30W), Power IQ 3.0 Portable Charger with PD 30W Max Output, 10,000mAh Battery Pack for iPhone 17/16 Series, Samsung, Huawei, Xiaomi, Redmi, Vivo, Oppo

Power Bank, 533 Power Bank (PowerCore 30W), Power IQ 3.0 Portable Charger with PD 30W Max Output, 10,000mAh Battery Pack for iPhone 17/16 Series, Samsung, Huawei, Xiaomi, Redmi, Vivo, Oppo

Product ID: 548811965

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Details

Connector type
Brand
Anker
Battery capacity
10000 Milliamp
Colour
white
Special features
Smart Digital

⚡30W max fast charging

📱10,000mAh battery capacity

🔋Smart LCD battery display

Description

⚡ Power up your day, anytime, anywhere!

SMART LCD DISPLAY - Instantly monitor battery life and usage time with a sleek digital readout.
COMPACT POWERHOUSE - Pocket-sized design delivering an extra 20 hours of video playback for nonstop entertainment.
UNIVERSAL COMPATIBILITY - Seamlessly powers iPhone 17/16 series, Samsung, Huawei, Xiaomi, and more—stay connected everywhere.
ADVANCED ACTIVE SHIELD 2 0 - Over 3 million daily temperature checks ensure your device stays safe and cool.
LIGHTNING FAST 30 W OUTPUT - Charge your devices up to 3x faster and stay ahead in the fast lane.

The Anker 533 Power Bank (PowerCore 30W) is a sleek, portable charger featuring a 10,000mAh battery and 30W Power Delivery for rapid charging. Equipped with a smart LCD display and advanced ActiveShield 2.0 safety system, it offers reliable, fast, and safe power for a wide range of smartphones including the latest iPhone 17/16 series and popular Android brands.

Specifications

Batteries	1 Lithium Ion batteries required. (included)
Item model number	A1256
Special features	Smart Digital Display, Short Circuit Protection, Slim, Over Charging Protection, Fast Charging, Travel; USB-C Input : 5V⎓3A/ 9V⎓2A / 12V⎓1.5A; USB-C Output : 5V⎓3A / 9V⎓3A / 12V⎓2.5A / 10V=2.25A / 15V⎓2A / 20V⎓1.5A USB-A Output：5V⎓ 3A/ 9V⎓ 2A / 10V⎓2.25A/ 12V⎓1.5A Total Output：5V⎓4.8A
Color	white
Item Weight	222 g

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