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Liitokala Engineer Lii-500 4-Slot LCD Smart Universal Battery Tester Charger – Best Battery Analyzer in Bangladesh

Liitokala Engineer Lii-500

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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