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 Nano Power Bank offers an estimated 5500mAh to 7000mAh to power devices.

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

To estimate charges, use this formula: (Power Bank Capacity × 0.7) ÷ Device Battery Capacity. For example, an iPhone 15 with a 3,877mAh battery can receive about 1.92 charges from a 10000mAh power bank (calculated as (10000mAh × 0.7) ÷ 3,877mAh).

How can I charge an iPhone 13 Pro Max with this power bank?

To charge iPhones prior to the iPhone 15 series, an additional USB-C to Lightning cable is required.

Is it normal for the power bank to get slightly warm during use?

Slight heating due to efficiency losses in the conversion circuit is normal. The temperature of this Anker Power Bank meets the temperature limits of the IEC62368 certification standard.

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⚡ Power Up Anywhere, Anytime — Because Your Hustle Never Pauses

DUAL DEVICE CHARGING - Keep your essential devices powered simultaneously—boost productivity without the wait.
ALL IN ONE POWERHOUSE - Seamlessly combines power bank, foldable wall plug, and built-in USB-C cable for ultimate convenience on the go.
ULTRA PORTABLE DESIGN - Sleek, lightweight, and pocket-friendly at just 8.82 oz, perfect for busy professionals who never stop moving.
ECO CONSCIOUS CERTIFIED - ClimatePartner certified, so you can power up responsibly and join the movement toward sustainable tech.
LIGHTNING FAST 30 W OUTPUT - Charge your iPhone 15 Pro from 0 to 50% in just 25 minutes—because every minute counts.

The AnkerNano 3-in-1 Portable Charger is a compact 10,000mAh power bank featuring a built-in USB-C cable and foldable wall plug. Delivering up to 30W two-way fast charging, it powers iPhone 15/16/17 series, Galaxy, and MacBook devices efficiently. Designed for travel with a lightweight, pocket-sized form factor, it supports simultaneous charging of two devices and is ClimatePartner certified for eco-friendly use.

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Item Dimensions L x W x Thickness	4.25"L x 1.22"W x 1.97"Th
Battery Cell Type	Lithium Polymer
Color	Black
Warranty Type	Limited
Recommended Uses For Product	Outdoor
Is Electric	No
Portable	No
Voltage	5 Volts
Power Source	Battery
Number of Ports	3
Connector Type Used on Cable	USB-C1+Built-in C Cable1
Battery Capacity	10000 Milliamp Hours
Additional Features	Fast Charging

AnkerNano 3-in-1 Portable iPhone Charger, 10,000mAh Power Bank with Built-in USB-C Cable and Foldable Wall Plug, 30W Max Battery Pack, Travel Essentials for iPhone 17/16/15 Series, Galaxy, MacBookClimatePartner certified

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