Why is my power bank providing fewer charges than expected?

Energy loss during charging due to inefficiencies in battery cells and circuitry results in a 30% to 45% capacity reduction. A fully charged Anker 25,000mAh power bank typically delivers about 13,750 to 17,500mAh.

What is Trickle Charging Mode?

Trickle Charging Mode lets the USB-A port charge low-power devices like watches or earbuds. Turn it on or off by double-pressing the button. When enabled, a small blue dot appears, and a low standby output is normal.

How long does it take to recharge the power bank?

The recharge time depends on the charger's power and the ambient temperature. Using a 100W or higher charger at 77°F (25°C), it typically takes about 2 hours to fully recharge the power bank.

Why does the power bank drain quickly when charging a laptop?

When charging a laptop, the power bank operates at high output which slightly reduces efficiency. Laptop batteries are also much larger than phone batteries, so the laptop's battery percentage rises slowly, making the power bank seem to drain faster.

Why is the power bank's output lower than expected?

Power bank's output depends on the power required by the connected device. As the device's battery level increases, the required power decreases. For example, with an iPhone 16 Pro and its original charger, the power drops to about 6W at 70% battery.

ASIN	B0DCBB2YTR
Batteries	1 C batteries required. (included)
Best Sellers Rank	#273 in Cell Phones & Accessories ( See Top 100 in Cell Phones & Accessories ) #19 in Cell Phone Portable Power Banks
Customer Reviews	4.6 4.6 out of 5 stars (7,717)
Date First Available	January 7, 2025
Item Weight	1.31 pounds
Item model number	A1695
Manufacturer	Anker Innovations Limited
Product Dimensions	6.18 x 2.13 x 1.93 inches

Laptop Power Bank, 25,000mAh Portable Charger with Triple 100W USB-C Ports, Built-in Retractable Cables, Flight-Approved for Travel, iPhone 17/16 Series, MacBook, Samsung, and More

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