Liitokala Engineer Lii-500 4-Slot LCD Smart Universal Battery Tester Charger – Best Battery Analyzer in Bangladesh
Professional Battery Management Solution for Experts, Engineers & Tech Enthusiasts
Discover the ultimate battery management tool with the Liitokala Engineer Lii-500 4-Slot LCD Smart Universal Battery Tester Charger – Bangladesh’s most trusted professional-grade battery analyzer and charger. Whether you’re an electronics engineer in Dhaka, a flashlight enthusiast in Chittagong, or a tech professional anywhere in Bangladesh, this advanced battery management system delivers laboratory-grade precision at an affordable price.
🏆 Why Liitokala Engineer Lii-500 is Bangladesh’s #1 Professional Battery Tester/Charger
The Liitokala Engineer Lii-500 represents the pinnacle of battery charging and testing technology, combining professional laboratory-grade accuracy with user-friendly operation. This isn’t just a battery charger – it’s a complete battery analysis laboratory that fits on your desk. Trusted by thousands of engineers, technicians, hobbyists, and professionals across Bangladesh for its exceptional accuracy and reliability.
⚡ Revolutionary Battery Management Technology Battery Tester
Advanced 4-Slot Independent Operation System
- Simultaneous Multi-Battery Processing: Charge, test, or analyze up to 4 different batteries simultaneously
- Independent Slot Control: Each slot operates completely independently with separate settings and monitoring
- Mixed Battery Type Support: Different battery chemistries can be processed simultaneously in different slots
- Individual Current Control: Each slot can be set to different charging currents (300mA, 500mA, 700mA, 1000mA)
- Parallel Processing Efficiency: Complete multiple battery tasks in fraction of traditional time
- Smart Auto-Detection: Automatically identifies battery type and optimizes charging parameters
Professional LCD Display & Monitoring System
- High-Resolution LCD: Crystal-clear display shows comprehensive real-time battery data
- Multi-Parameter Monitoring: Voltage, current, capacity, internal resistance, and elapsed time display
- Graphical Interface: Intuitive icons and symbols for easy operation
- Real-Time Updates: Live monitoring of charging progress and battery health status
- Data Logging: Historical data storage for battery performance tracking
- Error Code Display: Clear diagnostic messages for troubleshooting
Comprehensive Battery Chemistry Support Battery Tester
- Lithium-Ion (Li-ion): 18650, 26650, 21700, 20700, 18500, 17670, 16340 (CR123A), 14500, 10440
- Nickel Metal Hydride (Ni-MH): AA, AAA, A, SC, C, D sizes and custom configurations
- Nickel Cadmium (Ni-CD): All standard sizes from AAA to D with professional charging profiles
- Protected Batteries: Full support for batteries with built-in protection circuits
- Button Cell Support: CR2032, CR2025, and other coin cell batteries with adapter
- Custom Batteries: Flexible voltage range accommodates specialty and custom battery packs
🔬 Professional Testing & Analysis Capabilities
Advanced Testing Modes
- Charge Mode: Optimal charging with temperature compensation and voltage monitoring
- Fast Test Mode: Quick capacity estimation in under 30 minutes for rapid assessment
- Nor Test Mode: Complete charge-discharge cycle for accurate capacity measurement
- Storage Mode: Prepares batteries for long-term storage with optimal voltage levels
- Discharge Mode: Controlled discharge for capacity testing and battery conditioning
- Refresh Mode: Reconditioning cycle for aging batteries to restore performance
Laboratory-Grade Measurement Accuracy
- Voltage Measurement: ±0.1% accuracy with 0.01V resolution
- Current Measurement: ±1% accuracy across full range
- Capacity Testing: mAh measurement with ±2% accuracy
- Internal Resistance: Professional-grade resistance measurement for battery health analysis
- Temperature Monitoring: Built-in thermal sensors prevent overheating damage
- Time Tracking: Precise elapsed time monitoring for process optimization
📱 Smart Features & Advanced Technology
Intelligent Safety Protection System
- Overcharge Protection: Automatic charge termination prevents battery damage
- Over-discharge Protection: Prevents deep discharge that damages battery chemistry
- Short Circuit Protection: Instant protection against accidental shorts
- Reverse Polarity Protection: Prevents damage from incorrect battery insertion
- Temperature Monitoring: Thermal protection with automatic current reduction
- Bad Battery Detection: Identifies and alerts for defective or dangerous batteries
Professional Power Management
- USB Power Bank Function: 5V/1000mA output for charging smartphones and devices
- Power Efficiency: >85% charging efficiency reduces heat and energy waste
- Input Power Monitoring: DC 12V/2A input with surge protection
- Auto Power-Off: Energy-saving automatic shutdown after operation completion
- Memory Function: Retains settings and preferences after power cycling
🎯 Professional Applications & Use Cases
Electronics Engineering & Development
Perfect for professionals working in Bangladesh’s growing tech sector:
- Product Development: Battery testing for IoT devices, sensors, and embedded systems
- Quality Control: Production testing for battery-powered products
- Research & Development: Battery performance analysis for new product designs
- Prototype Testing: Reliable power solutions for development projects
- Field Testing: Portable battery analysis for on-site troubleshooting
Industrial & Commercial Applications
- Maintenance Teams: Battery testing for industrial equipment and backup systems
- Security Systems: UPS and alarm system battery maintenance
- Telecommunications: Mobile tower backup battery testing and maintenance
- Medical Equipment: Critical device battery testing for hospitals and clinics
- Renewable Energy: Solar system battery bank testing and optimization
Hobbyist & Enthusiast Applications
- RC Vehicle Enthusiasts: Li-Po and Ni-MH battery optimization for drones, cars, and planes
- Flashlight Community: 18650 and 26650 battery testing for high-performance flashlights
- Photography Equipment: Camera battery testing and capacity verification
- Amateur Radio: Battery maintenance for portable radio equipment
- Electronics Repair: Professional battery testing for repair shops and service centers
🔧 Technical Specifications & Engineering Details
Electrical Characteristics
- Input Voltage Range: DC 12V ±5% (11.4V – 12.6V)
- Input Current: Maximum 2A with surge protection
- Output Voltage Range: 1.2V – 4.35V (auto-detected)
- Charging Current Options: 300mA, 500mA, 700mA, 1000mA (selectable per slot)
- Discharge Current: Fixed 250mA for consistent testing
- USB Output: 5V ±0.1V, 1000mA maximum current
- Conversion Efficiency: >85% charging efficiency
- Standby Power: <2W when not actively charging
Physical Specifications & Build Quality
- Dimensions: 162mm × 96mm × 36mm (compact desktop design)
- Weight: 350g (balanced for portability and stability)
- Housing Material: High-grade ABS plastic with excellent heat dissipation
- Contact System: Gold-plated spring-loaded contacts for reliable connection
- Heat Management: Passive cooling with optimized ventilation design
- Environmental Rating: Indoor use, 0°C to 40°C operating temperature
Display & Interface Specifications
- LCD Type: High-contrast monochrome LCD with LED backlight
- Display Resolution: 128×64 pixels for crisp text and graphics
- Refresh Rate: Real-time updates every 1 second
- Button Interface: 4 tactile buttons with positive feedback
- Menu System: Intuitive navigation with clear status indicators
- Language Support: English interface with universal symbols
💡 Advanced Battery Science & Technology
Charging Algorithm Intelligence
- CC/CV Charging: Constant current followed by constant voltage for optimal Li-ion charging
- Delta-V Detection: Advanced Ni-MH/Ni-CD termination using voltage drop detection
- Temperature Compensation: Automatic adjustment based on battery temperature
- Soft Start: Gentle current ramp-up for deeply discharged batteries
- Trickle Charge: Maintenance charging for fully charged batteries
- Smart Termination: Multiple termination methods ensure complete, safe charging
Battery Health Analysis
- Capacity Degradation Tracking: Monitor battery aging over time
- Internal Resistance Analysis: Early detection of battery failure
- Voltage Sag Testing: Load testing reveals battery performance under stress
- Self-Discharge Testing: Measure battery retention for storage applications
- Cycle Life Tracking: Monitor charge-discharge cycles for lifetime estimation
- Performance Benchmarking: Compare batteries against manufacturer specifications
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