FNIRSI-FNB48S 1.77 Inch HD Multifunctional Mobile Phone Recharging Current Capacity Tester (Without Bluetooth Version)
FNIRSI-FNB48S 1.77 Inch HD Multifunctional Mobile Phone Recharging Current Capacity Tester (Without Bluetooth Version)
FNIRSI-FNB48S 1.77 Inch HD Multifunctional Mobile Phone Recharging Current Capacity Tester (Without Bluetooth Version)
The FNIRSI-FNB48S is a precision digital multifunctional tester designed to measure charging current, voltage, capacity, and power consumption characteristics of mobile phones and portable devices with a 1.77-inch HD color display. Mobile phone repair technicians, battery engineers, and electronics service centers use this device to diagnose charging circuit faults, validate charger specifications, and verify battery health before and after repairs. This tester solves critical problems in device troubleshooting by providing real-time measurement data that helps identify defective chargers, degraded batteries, and improper charging protocols that could damage expensive mobile devices.
Product Overview
The FNIRSI-FNB48S operates on the principle of inline current and voltage measurement through a precision shunt resistor circuit combined with high-resolution analog-to-digital conversion. When a mobile phone charger is connected through the tester, it measures the instantaneous current draw (in milliamps), voltage output (in volts), accumulated charge capacity (in milliamp-hours), and power dissipation (in watts) across the device under test. The 1.77-inch HD IPS display provides clear real-time visualization of these parameters with color-coded warnings for over-current or voltage anomalies, making it ideal for field diagnostics where quick assessment is critical.
This non-Bluetooth version eliminates wireless connectivity complexity while maintaining full measurement accuracy and reliability. The device features multiple USB charging protocols support including standard 5V charging, QC 2.0/3.0 fast charging detection, and USB-PD power delivery protocols up to 20V/5A. The rugged design with protective casing, intuitive button interface, and auto-ranging measurement capabilities make it suitable for both professional repair workshops and educational electronics laboratories. The absence of Bluetooth reduces power consumption and eliminates connectivity issues, making it a dependable standalone diagnostic instrument.
Key Specifications
| Specification | Details |
| Product Type | Digital USB Charging Current Capacity Tester |
| Brand | FNIRSI |
| Model Number | FNB48S |
| Display | 1.77 Inch HD IPS Color LCD |
| 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 |
| Voltage Measurement Range | 0-30V DC with 0.01V resolution |
| Current Measurement Range | 0-5A with 1mA resolution |
| Capacity Measurement Range | 0-99999 mAh with real-time accumulation |
| Power Measurement Range | 0-150W with 0.1W resolution |
| Charging Protocol Support | QC 2.0, QC 3.0, USB-PD, Standard 5V |
| Operating Temperature | 0-50 Degrees Celsius |
Key Features
- 1.77-Inch HD IPS Color Display with 320x240 resolution providing crisp visualization of all measurement parameters in direct sunlight and low-light conditions
- Multi-Protocol Charging Support detecting and displaying QC 2.0/3.0, USB Power Delivery, and standard 5V charging modes with automatic protocol identification
- Real-Time Dual-Axis Measurement displaying voltage and current simultaneously with live graphing capability to identify charging curve anomalies and voltage ripple
- Accumulated Capacity Tracking measuring total milliamp-hours transferred during charging cycles for battery health assessment and charger validation
- Over-Current and Over-Voltage Protection with audible alarm and visual indicators preventing damage to sensitive test equipment
- Data Logging Function storing up to 100 measurement records with timestamp for comparative analysis across multiple charging cycles
Applications and Use Cases
- Mobile Phone Repair Diagnostics validating charger functionality before replacement, detecting charging port issues, and confirming battery health in service centers
- Fast Charger Validation testing QC and USB-PD chargers to verify compliance with manufacturer specifications and identify counterfeit or degraded chargers
- Battery Capacity Verification measuring actual charge capacity of replacement batteries against rated specifications to ensure customer satisfaction and warranty compliance
- Power Bank Testing evaluating charging output stability, capacity claims, and thermal management during high-current delivery scenarios
- Electronics Education demonstrating charging principles, power delivery concepts, and circuit behavior in polytechnic and engineering laboratory settings
- Embedded System Development validating power supply performance and current draw characteristics during firmware testing and hardware optimization
How to Use
To begin using the FNIRSI-FNB48S, insert the USB connector of your charger into the tester's input port and connect your mobile phone or device to the tester's output USB connector. The display will immediately activate and begin showing real-time voltage, current, power consumption, and accumulated capacity readings. The tester automatically detects the charging protocol being used and displays it on the screen. For accurate capacity measurements, allow the charging cycle to complete naturally and observe the final mAh reading, which represents the total charge transferred. Use the navigation buttons to switch between different display modes including voltage-current graph view, power consumption trend, and data history records.
For diagnostic purposes, monitor the current draw pattern during the initial charging phase (should show high current for fast charging) and the final phase (should taper to lower values as battery reaches full capacity). Sudden current spikes or voltage fluctuations indicate charger or cable faults. The data logging feature allows you to record multiple charging sessions by pressing the record button before each test, enabling comparative analysis across different chargers or battery conditions. Always ensure the tester is operating within its specified voltage and current ranges to maintain measurement accuracy and device longevity.
Frequently Asked Questions
What is the maximum voltage and current this tester can safely measure?
The FNIRSI-FNB48S can safely measure up to 30V DC and 5A continuous current. Exceeding these limits may damage the internal measurement circuitry. The device includes over-voltage and over-current protection that triggers an alarm at 150% of rated specifications, providing a safety margin before damage occurs.
Can this tester measure USB Power Delivery chargers above 5A?
The FNB48S is rated for maximum 5A continuous measurement. While USB-PD chargers can deliver up to 5A at various voltages, this tester will accurately measure up to its 5A limit. For higher current applications (10A or 15A), you would need the Bluetooth-enabled FNIRSI-FNB48 model with extended current range specifications.
How accurate are the capacity measurements in mAh?
The tester provides 1mA resolution with typical accuracy of plus-minus 2% under standard operating conditions. Accuracy depends on stable voltage supply, proper cable connections, and completing full charging cycles. For battery capacity verification, allow at least 30 minutes of charging time to accumulate sufficient data points for reliable mAh calculations.
Does this tester work with all types of USB chargers?
The FNB48S works with standard USB-A chargers, USB-C Power Delivery chargers, and micro-USB chargers through appropriate adapter cables. It supports QC 2.0, QC 3.0, USB-PD, and standard 5V charging protocols. However, it does not support proprietary charging protocols like Apple Lightning or older Samsung proprietary standards that use non-standard pin configurations.
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
Buy FNIRSI-FNB48S 1.77 Inch HD Multifunctional Mobile Phone Recharging Current Capacity Tester (Without Bluetooth Version) Online in India
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