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The Ultimate User Manual for Portable Chargers: Identifying False Capacity Labeling and Tips to Extend Cycle Life I. Identifying False Capacity Labeling: From Parameters to Actual Testing, Avoid “Digital Traps” Core Parameter Distinction: The “battery capacity” (usually labeled in mAh) of a portable charger differs from its “rated capacity” (usually labeled in Wh or mAh/5V). The rated capacity represents the actual power that can be output to devices. Tests show that a portable charger labeled with “20,000mAh battery capacity” typically has a rated capacity of approximately 12,000mAh/5V. If a merchant …

Global Universal! Ultimate Guide to Choosing Outdoor Power Supplies: How to Evaluate Capacity, Charging Speed, and Safety Certifications? I. Capacity Parameters: Understand Wh and mAh to Avoid “False Labeling Traps” Core Difference: Wh (Watt-hour) is an energy unit that directly reflects the actual power supply capacity of an outdoor power supply; mAh (milliampere-hour) is a charge unit, and the actual capacity can only be calculated by combining it with voltage. Tests show that for outdoor power supplies with the same mAh value, the Wh value of the one with a …

A Beginner’s Guide to Home Energy Storage Systems: Grid-Tied vs. Off-Grid – How to Choose? Money-Saving Tips with Time-of-Use Electricity Prices I. Grid-Tied vs. Off-Grid Systems: Core Differences and Suitable Scenarios Core Differences: A grid-tied system must be connected to the public power grid and cannot operate independently off the grid; an off-grid system is equipped with an independent battery pack and can supply power completely independent of the grid. Tests show that for grid-tied and off-grid systems with the same capacity, the initial installation cost of the former is …

Avoid Pitfalls When Choosing High-Frequency Signal Cables: How to Prevent Signal Interference and Transmission Delay? I. Disassembly of Key Indicators: Shielding Performance and Transmission Rate, the Core Determinants of Signal Quality Shielding Performance: High-frequency signal cables need to isolate external electromagnetic interference through a shielding layer. Common shielding structures include “aluminum foil + braided mesh” and “double-layer braided mesh”. Tests show that high-frequency signal cables using “aluminum foil + 90% coverage braided mesh” have an anti-interference capability more than 60% stronger than those with a single-layer aluminum foil shield. In …

Demystifying PD Charging Principles and Proprietary Protocols in One Article “Why does the same charger charge my phone quickly but my tablet slowly?” “Why can a laptop charger fast-charge a phone, but not vice versa?” The core of these questions lies in charging protocols — the “communication language” between devices and chargers. Among them, the PD protocol is the universal mainstream, while proprietary protocols are manufacturers’ “exclusive recipes.” This article will help you fully understand them. Ⅰ. The Underlying Logic of Fast Charging: The Core Formula for Power Charging speed …

Unveiling the Core Technology of Fast Charging: Why Gallium Nitride (GaN) Revolutionizes Charging Experience? “100W power yet smaller than an egg” “Charging a laptop and a phone simultaneously without overheating” — these cutting-edge features of high-end fast chargers today all rely on the core material: Gallium Nitride (GaN). This seemingly professional term is the key to reshaping the charging experience, and this article will help you understand its technical magic. Ⅰ. Gallium Nitride: The “Third-Generation Semiconductor” Superior to Silicon Gallium Nitride is a compound semiconductor material formed by nitrogen and …

MFi Certification: Why Do Your Apple Accessories Need This “Little Lightning Bolt”? If you’ve used Apple accessories, you’ve probably seen the “Made for iPhone/iPad” logo printed on the connectors — that’s the core symbol of MFi certification. This official certification system launched by Apple may seem like just a logo, but it holds the key code for compatibility between accessories and Apple devices. Ⅰ. What is MFi Certification? Apple’s “Accessory Admission Ticket” MFi stands for “Made for iPhone/iPad/iPod,” an official certification program launched by Apple for third-party accessories. Since its …

2025 Power Bank Boarding Guide: Understand CAAC’s New Rules and Pitfall-Avoiding Tips in One Article As 3C devices have become essential for travel, power banks have become a “must-have” item in travelers’ luggage. However, since the implementation of CAAC’s new regulations on June 28, 2025, the standards for carrying power banks on board have been further tightened. Many travelers have had their items detained due to lack of understanding of the rules. Combining CAAC’s latest regulations and airport practical experience, this article details the full-process standards for carrying power banks …