FNIRSI-FNB38 1.77 Inch HD Multifunctional Mobile Phone Recharging Current Capacity Tester
FNIRSI-FNB38 1.77 Inch HD Multifunctional Mobile Phone Recharging Current Capacity Tester
FNIRSI-FNB38 1.77 Inch HD Multifunctional Mobile Phone Recharging Current Capacity Tester
The FNIRSI-FNB38 is a precision handheld battery and charging current capacity tester designed for mobile phone technicians, electronics engineers, and power supply quality assessment professionals. This device measures charging current, voltage, capacity, and power characteristics with a 1.77-inch HD color display for real-time data visualization. It solves critical problems in battery health diagnosis, charger compatibility verification, and power delivery protocol testing by providing accurate measurements across multiple parameters simultaneously.
Product Overview
The FNIRSI-FNB38 operates on the principle of inline current and voltage measurement through a precision shunt resistor and high-resolution analog-to-digital conversion circuitry. When connected between a power source and mobile device, it captures instantaneous current flow, voltage levels, and accumulated charge capacity over time. The device supports multiple USB standards including USB-A, USB-C, and Lightning connectors, enabling compatibility testing across all major smartphone charging ecosystems. The 1.77-inch IPS HD display provides 320x240 pixel resolution with wide viewing angles, ensuring clear data visibility in various lighting conditions and work environments.
This model distinguishes itself through simultaneous multi-parameter tracking capability, displaying voltage, current, capacity, power consumption, and charging time in real-time. The intelligent data logging feature records charging profiles, allowing technicians to analyze power delivery consistency and identify intermittent connection issues. Temperature monitoring sensors prevent unsafe charging conditions, while the compact form factor and lightweight design make it an essential tool for mobile repair shops, quality assurance laboratories, and electronics development teams. The FNIRSI-FNB38 provides the precision measurement accuracy required for USB Power Delivery (USB-PD) protocol verification and battery capacity validation.
Key Specifications
| Specification | Details |
| Product Type | Digital USB Charging Current and Capacity Tester |
| Brand | FNIRSI |
| Model | FNB38 |
| Display | 1.77 inch HD IPS Color LCD, 320x240 pixels |
| Measurement Parameters | Voltage, Current, Capacity, Power, Energy, Resistance, Temperature |
| Voltage Range | 4.5V to 30V DC |
| Current Range | 0A to 5A with 0.01A resolution |
| Capacity Measurement | 0 to 9999mAh with 1mAh accuracy |
| Connector Support | USB-A, USB-C, Micro-USB, Lightning compatible |
| Data Logging | Real-time charging profile recording and playback |
| Battery | Built-in rechargeable lithium battery, 1000mAh capacity |
| Origin | Original/Authentic |
| Warranty | 7 days on manufacturing defects |
| Shipping | 1-5 days from Bengaluru |
| Delivery | 7-8 days across India |
| Support | 24/7 via Email and WhatsApp |
Key Features
- 1.77-inch HD IPS display with 320x240 pixel resolution for crystal-clear real-time data visualization and charging curve graphs
- Multi-parameter simultaneous measurement including voltage, current, capacity, power consumption, and charging duration with 0.01A current resolution
- Universal connector compatibility supporting USB-A, USB-C, Micro-USB, and Lightning protocols for testing all smartphone charging standards
- Intelligent data logging with charging profile recording capability enabling analysis of power delivery consistency and identification of intermittent faults
- Temperature monitoring sensor with overvoltage and overcurrent protection ensuring safe testing of high-power chargers and fast-charging protocols
- Compact handheld design with integrated rechargeable 1000mAh battery providing portable operation for field testing and mobile repair workshops
- USB Power Delivery protocol detection and verification supporting QC 2.0, QC 3.0, PD 2.0, and proprietary fast-charging standards
- High-precision measurement accuracy with 0.01V voltage resolution and 1mAh capacity accuracy for battery health assessment
Applications and Use Cases
- Mobile phone repair and maintenance shops requiring accurate battery capacity verification and charger compatibility testing before customer device handover
- Electronics quality assurance laboratories conducting USB Power Delivery protocol compliance testing and fast-charging standard validation for smartphone manufacturers
- Battery and power supply manufacturers performing incoming component inspection and outgoing product validation for capacity and charging characteristics
- Field technicians diagnosing intermittent charging issues by recording and analyzing real-time power delivery profiles and identifying voltage fluctuations
- Electronics development and prototyping teams evaluating custom charger designs and power management circuits during hardware validation phases
- Educational institutions and training centers teaching power electronics principles through practical hands-on measurement and analysis exercises
- Power bank and portable battery manufacturers testing capacity retention and charging efficiency across multiple charge-discharge cycles
How to Use
To begin using the FNIRSI-FNB38, first power on the device by pressing the power button until the HD display illuminates. The device will automatically detect the connected charger and display the voltage output. Select the appropriate connector type matching your test device using the menu interface, ensuring secure connection to prevent measurement errors. Connect the tester inline between the charger and the mobile device or power bank being tested. The display will immediately show real-time voltage, current draw, and accumulated capacity measurements. Allow the device to record data throughout the complete charging cycle to obtain accurate total capacity and charging time measurements.
For advanced analysis, use the data logging feature to record the entire charging profile by navigating to the logging menu and selecting start recording. The device will capture voltage and current variations throughout the charging process, allowing you to identify power delivery inconsistencies, voltage drops, or current fluctuations that indicate charger quality issues. Review recorded data by accessing the playback function, which displays charging curves and statistical summaries including average current, peak voltage, and total energy transferred. For temperature-sensitive testing, monitor the built-in temperature sensor readings to ensure the charger and battery remain within safe operating ranges. Charge the tester's internal battery using any standard USB charger when the battery indicator shows low power, ensuring continuous operation during extended testing sessions.
Frequently Asked Questions
What is the maximum current capacity the FNIRSI-FNB38 can safely measure?
The FNIRSI-FNB38 is rated for maximum continuous measurement of 5A current, making it suitable for testing standard smartphone chargers ranging from 1A to 3A output and high-power fast chargers up to 5A. The device includes built-in overcurrent protection that triggers an alert when current exceeds safe measurement limits, preventing damage to the internal circuitry. For chargers exceeding 5A output, such as laptop power supplies, external measurement shunts may be required.
Can the FNIRSI-FNB38 measure capacity accurately for different battery chemistries?
Yes, the FNIRSI-FNB38 measures capacity by integrating current flow over time, a method that works accurately across all battery chemistries including lithium-ion, lithium-polymer, and nickel-metal hydride batteries. The 1mAh resolution accuracy ensures reliable capacity measurements for smartphones, tablets, power banks, and portable devices. However, for maximum accuracy, ensure the battery is fully discharged before beginning capacity testing and maintain consistent ambient temperature throughout the measurement cycle.
Does the FNIRSI-FNB38 support USB Power Delivery protocol detection?
Yes, the FNIRSI-FNB38 includes intelligent protocol detection that automatically identifies and displays the active charging standard including QC 2.0, QC 3.0, USB-PD 2.0, and proprietary fast-charging protocols. The device displays the detected protocol on the HD display, allowing technicians to verify that chargers are negotiating the correct power delivery protocol. This feature is essential for validating fast-charging compatibility and ensuring devices receive optimal charging current for their capabilities.
How long does the internal battery last on a single charge?
The FNIRSI-FNB38 features a built-in 1000mAh rechargeable lithium battery that provides approximately 8-10 hours of continuous operation under typical testing conditions. Battery life depends on display brightness settings and data logging frequency. The device includes a low battery indicator on the display, alerting users when charging is required. Recharge the internal battery using any standard USB charger connected to the micro-USB port, typically reaching full charge within 2-3 hours.
Can I use the FNIRSI-FNB38 to test wireless chargers?
The FNIRSI-FNB38 is designed for wired charging measurement and cannot directly test wireless charging systems. However, you can use it to measure the power output of wireless charging receivers by connecting the tester between the receiver module and the battery being charged. For testing wireless charger power delivery efficiency, you would need to measure the input power to the wireless transmitter using a separate AC power meter in conjunction with this device.
When will I receive my order?
Orders are dispatched within 1-5 business days from our Bengaluru warehouse. Delivery takes 7-8 days to most locations across India.
What is your return and warranty policy?
We offer a 7-day return policy on manufacturing defects only. Contact support within 7 days of receipt for free replacement or full refund. Not applicable for user damage or misuse.
Are bulk discounts available?
Yes, wholesale pricing for orders of 10 or more units. Contact our sales team via WhatsApp or email for a customized bulk quote.
Why Buy from The Tech Depot
- Genuine Products: Sourced directly from authorized distributors with authentication
- Expert Team: Our technical team validates every product before listing
- Fast Shipping: Dispatched within 1-5 days from our Bengaluru warehouse
- Pan-India Delivery: 7-8 days to Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata
- Payment Options: COD, UPI, credit/debit cards, net banking, EMI available
- Technical Support: 24/7 expert guidance via email and WhatsApp
- Returns: 7-day return policy on manufacturing defects only