As a technology engineer specializing in consumer electronics, I’ve had the opportunity to test and evaluate countless diagnostic tools over the years. Today, I’m excited to share my in-depth analysis of the Eversame 2-in-1 Type C USB Tester, a compact yet powerful device that has quickly become an indispensable tool in my arsenal for USB power diagnostics and cable testing.
First Impressions and Build Quality
The Eversame USB tester arrives in a compact package that immediately signals its plug-and-play nature. At first glance, the device’s small form factor might seem limiting, but this compact design is actually one of its greatest strengths. The unit features a vibrant color LCD screen that, while small, provides surprisingly clear and readable information across multiple data screens.
The build quality feels solid for a device in this price range, though I must note some concerns about the connector durability that I’ll address later in this review. The device features both USB-A and USB-C input/output ports, making it truly versatile for modern charging scenarios where we’re dealing with an increasingly diverse ecosystem of connectors and protocols.
Core Functionality and Features
Dual Input Capability
One of the standout features of this tester is its genuine dual-input design. Unlike some competitors that simply provide adapters, the Eversame features dedicated USB-A and USB-C input ports. This means you can test USB-A to USB-A connections, USB-C to USB-C connections, or even mixed configurations like USB-C input to USB-A output.
During my testing, I found this flexibility invaluable when diagnosing charging issues across different device types. Whether I was testing a smartphone charger, laptop power delivery system, or portable power bank, the dual-input design eliminated the need for additional adapters in most scenarios.
Comprehensive Measurement Suite
The device provides an impressive array of measurements:
- Voltage (V): DC 3.6-30V range
- Current (A): 0-5.1A range
- Power (W): Real-time wattage calculation
- Resistance (Ω): Load resistance measurement
- Energy (Wh): Cumulative energy consumption
- Capacity (mAh): Cumulative current consumption
- Temperature: Internal device temperature
- Timer: Session timing for capacity calculations
This comprehensive measurement suite makes the device suitable for everything from basic “does this charger work?” questions to detailed power consumption analysis for battery life optimization.
Multiple Display Modes: Information at Your Fingertips
The Eversame features nine different display screens, each optimized for specific use cases:
Screen 1: Primary Data Display
This is the workhorse screen that most users will spend their time on. It displays voltage and current in a medium font on the top line, followed by power and equivalent load resistance. The third line shows watt-hours, temperature, and amp-hours, while the bottom line features a timer and test group number. This layout provides all essential information at a glance without feeling cluttered.
Screen 2: USB Protocol Analysis
This technical screen shows voltage readings for different USB lines and displays the active USB protocol. While this information is primarily useful for engineers and advanced users, it can be valuable for troubleshooting USB Power Delivery negotiations and understanding why certain devices aren’t charging at expected speeds.
Screens 3-4: Chinese/English Variants
These screens present the same data in different languages, ensuring accessibility for users regardless of their preferred language.
Screen 5: Large Font Display
For users who struggle with the small text on other screens, this mode presents voltage, current, and power in large, easily readable fonts. This is particularly useful in bright outdoor conditions or for users with vision concerns.
Screens 6-7: Graphical Analysis
These screens provide real-time graphing capabilities, showing voltage and current variations over time. The time resolution is adjustable from 0.5 to 5 seconds via long press. This feature is particularly valuable for identifying charging irregularities, voltage drops under load, or current fluctuations that might indicate cable or charger problems.
Power Delivery and Protocol Support
One of the most impressive aspects of the Eversame tester is its robust support for modern charging protocols. During my testing, I confirmed compatibility with:
- USB Power Delivery (PD): Full support for PD negotiation up to the device’s 30V limit
- Qualcomm Quick Charge: Proper voltage stepping from 5V to 9V and 12V
- Samsung Adaptive Fast Charging: Correct protocol recognition and voltage adjustment
- Standard USB charging: Reliable measurement of basic 5V charging scenarios
The device correctly handles PD negotiation, which is crucial for accurate testing of modern USB-C chargers and devices. I observed proper voltage stepping during PD handshakes, confirming that the tester doesn’t interfere with normal charging protocols.
Real-World Performance and Accuracy
Measurement Accuracy
Comparing the Eversame’s readings against my laboratory-grade Fluke 87 Digital Multimeter, I found the measurements to be remarkably accurate for a device in this price range. Voltage readings were consistently within ±0.02V, and current measurements showed similar precision within ±0.01A. While this isn’t lab-grade precision, it’s more than adequate for consumer and prosumer applications.
Temperature Monitoring
The internal temperature sensor provides useful information about the device’s thermal state during operation. However, I noted that the temperature reading appears to be consistent at around 22°C regardless of ambient conditions, suggesting this may be measuring a reference temperature rather than actual ambient temperature.
Data Logging and Test Groups
The device supports 10 separate test groups, allowing users to organize and separate different testing sessions. This feature proved invaluable when comparing multiple chargers or cables, as I could maintain separate datasets for each item under test. The ability to reset individual parameters (amp-hours, watt-hours, timer) independently adds to the device’s flexibility.
USB-C Specific Considerations
PD Functionality
The USB-C implementation deserves special attention. Unlike USB-A ports that typically provide constant voltage, USB-C PD chargers wait for device negotiation before providing power. The Eversame handles this correctly, but users need to understand that USB-C testing often requires a device to be connected to the output to initiate PD negotiation.
Connector Limitations
I discovered some important limitations with the USB-C implementation. The device appears to only support USB 2.0 data lines, not the full USB 3.0+ differential pairs. This means that accessories requiring USB 3.0+ speeds may fall back to USB 2.0 operation or may not function at all when tested through this device. This limitation doesn’t affect power measurement accuracy but is important to understand when testing high-speed USB devices.
Directional Constraints
Unlike some higher-end testers, the USB-C ports are directional. The input and output are clearly labeled and must be connected correctly for proper operation. While this might seem limiting, it actually helps prevent user error and ensures consistent measurements.
Practical Applications and Use Cases
Cable Quality Assessment
One of the most valuable applications I found was cable quality assessment. By testing the same charger with different cables, I could quickly identify cables with high resistance that were limiting charging speed. This testing revealed that several cables I thought were “fast charging” capable were actually significant bottlenecks.
Charger Verification
The device excels at verifying charger specifications. I tested numerous chargers claiming various wattage outputs and found significant variations from their advertised capabilities. The Eversame made it easy to identify underperforming chargers that weren’t delivering their promised power levels.
Power Bank Capacity Testing
For testing portable power banks, the cumulative capacity measurement feature proved invaluable. By fully charging a power bank while monitoring the watt-hour input, I could verify actual capacity versus advertised specifications. The efficiency calculations possible with this data helped identify which power banks provided the best value.
Solar Panel Testing
The device’s voltage range and accuracy made it surprisingly useful for testing small solar panels and solar-powered devices. The ability to monitor power generation in real-time helped optimize panel positioning and assess performance under different lighting conditions.
User Interface and Controls
Single Button Interface
The entire device is controlled through a single button, which initially seems limiting but is actually quite intuitive once you understand the system:
- Single press: Advance to next screen
- Double press: Reset amp-hour counter
- Triple press: Reset watt-hour counter
- Four presses: Reset timer
- Five presses: Select test group
- Seven presses: Zero current offset
- Long press: Access settings or reset all counters
Settings Menu
The settings menu provides access to eight configurable parameters:
- Over Voltage Protection (OVP)
- Low Voltage Protection (LVP)
- Over Current Protection (OCP)
- Screen rotation
- Factory reset
- Data clearing
- Standby screen style
- Capacity ratio calculation
The settings interface, while functional, requires patience to navigate. The long-press-to-edit, click-to-decrement, double-click-to-increment system works but feels somewhat clunky compared to more modern interfaces.
Limitations and Considerations
Display Size and Readability
The most common complaint I encountered during testing was display readability. The screen is quite small, and some of the information is presented in tiny fonts. Users with vision concerns may find themselves reaching for reading glasses or using their phone’s camera zoom function to read detailed information.
Form Factor Constraints
The device’s form factor, while compact, can create awkward positioning when plugged directly into wall chargers. Depending on the outlet orientation and charger design, the display may face away from the user or be partially blocked. Short USB extension cables can alleviate this issue but add to the overall cost.
Connector Durability Concerns
Several long-term users reported connector failure, particularly with the USB-C connector breaking off from the circuit board. The connectors appear to be supported only by their solder joints, making them vulnerable to mechanical stress. Users should handle the device carefully and avoid putting lateral stress on the connectors.
Power Requirements
The device cannot operate independently – it must be powered through one of its input connectors. This means you can’t use it to test standalone voltage sources without also providing power to the tester itself. Additionally, the USB-C input requires either a connected device or the included micro-USB adapter to function properly.
Comparison with Alternatives
In the USB tester market, the Eversame competes primarily on versatility and price. Higher-end testers offer features like Bluetooth connectivity, larger displays, and more robust construction, but at significantly higher price points. Lower-cost alternatives often lack the dual-input capability or comprehensive measurement suite that makes the Eversame attractive.
The device’s ability to handle both USB-A and USB-C in a single unit, combined with its support for modern charging protocols, gives it a significant advantage over single-connector testers or older devices that don’t properly handle PD negotiation.
Value Proposition and Recommendations
At its typical retail price of around $15-20, the Eversame 2-in-1 USB tester represents exceptional value for anyone who regularly works with USB-powered devices. The comprehensive measurement capabilities, dual-input design, and protocol support provide functionality that would have cost hundreds of dollars in professional equipment just a few years ago.
Who Should Buy This Device?
- Electronics enthusiasts who want to understand their charging infrastructure
- IT professionals who need to troubleshoot charging issues
- Content creators who work with battery-powered equipment
- Solar power experimenters working with USB-based systems
- Anyone with multiple devices who wants to optimize their charging setup
Who Might Want Alternatives?
- Professional technicians who need laboratory-grade accuracy
- Users with vision concerns who require larger displays
- Field workers who need ruggedized equipment
- Those requiring Bluetooth connectivity for remote monitoring
Final Verdict
The Eversame 2-in-1 Type C USB Tester successfully delivers on its promise of providing comprehensive USB power diagnostics in an affordable, compact package. While it has limitations in terms of display size, connector durability, and some advanced features, these drawbacks are reasonable given its price point and target market.
The device excels at its primary mission: helping users understand and optimize their USB charging ecosystem. Whether you’re trying to identify a failing cable, verify a charger’s output, or measure your device’s power consumption, the Eversame provides the tools and accuracy needed for confident decision-making.
For the price, this tester offers remarkable capability and has earned its place as an essential tool for anyone serious about understanding their electronic devices’ power requirements. Just handle it carefully, keep those extension cables handy for awkward installations, and prepare to be surprised by what you learn about your supposedly “fast” chargers and cables.
Rating: 4.5/5 stars – An exceptional value proposition with minor limitations that don’t significantly impact its core functionality.
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