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 your hustle—anywhere, anytime!

DUAL DEVICE CHARGING - Cut clutter and charge two devices simultaneously to stay ahead of your busy day.
ALL IN ONE POWERHOUSE - Seamlessly combines power bank, charger, and cable for ultimate convenience.
COMPACT TRAVEL READY - Lightweight 250g design with foldable plug fits perfectly in your bag or pocket.
LIGHTNING FAST 30 W OUTPUT - Charge your iPhone 15 Pro to 50% in just 25 minutes—no more waiting around.
TRUSTED ANKER RELIABILITY - Backed by an 18-month warranty and dedicated customer support for peace of mind.

The Anker 3-in-1 Power Bank is a sleek, portable 10,000mAh battery pack featuring a built-in USB-C cable and foldable AC plug. Delivering up to 30W two-way fast charging, it powers your iPhone 15 Pro to 50% in just 25 minutes and supports dual device charging. Compact and lightweight, it’s designed for professionals on the move who demand reliable, clutter-free power solutions.

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Product Dimensions	10.8 x 3.1 x 5 cm; 250.04 g
Batteries	1 Lithium Ion batteries required.
Item model number	A1637
Special features	3-in-1, Built In Cable, Fast Charging
Colour	Black
Manufacturer	Anker Innovations Limited
Item Weight	250 g

Anker 3-in-1 Power Bank USB C Charger Block, 10,000mAh Portable Charger with Built-in USB-C Cable and Foldable AC Plug, 30W Max Compact Battery Pack, for iPhone 15 Series, Galaxy, MacBook, and More

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