Why my power bank provide fewer charges than expect?

Usually an external battery could supply 60%-70% power to other devices. Approximately 30-40% of the battery capacity is lost in circuit heat and voltage conversions.So a fully charged INIU 10000mAh power bank can offer 6000-7000 mAh to your devices.

How to calculate the possible number of charges?

Industry-standard formula: (Rated capacity × 65%) ÷ Device battery capacity ≈ Number of Charges. eg. (10,000mAh Powerbank × 0.65) ÷ 3279mAh iPhone14 battery ≈ 2.0 charges

ASIN	B0DQD35SQ4
Batteries	1 Lithium Polymer batteries required. (included)
Best Sellers Rank	#514 in Cell Phones & Accessories ( See Top 100 in Cell Phones & Accessories ) #37 in Cell Phone Portable Power Banks
Color	Black
Date First Available	December 13, 2024
Item Weight	1.44 ounces
Item model number	P50
Manufacturer	Shenzhen Topstar Industry Co.,Ltd.
Other display features	Wireless
Product Dimensions	3.29 x 2.09 x 1 inches
Special features	Digital Display, Fast Charging, Lightweight, Pocket Size, Travel essential

Mini Portable Charger, Small 45W PD Power Bank, 10000mAh USB C in&Out Fast Charging Pocket Size Battery Pack, Travel Essentials Powerbank for iPhone 17 16 15 14 Pro Air, Xiaomi, Samsung S24 etc

Details

Description

Specifications

Common Questions