LiitoKala Lii-500 LCD Smart Battery Charger

LiitoKala Lii-500 Smart 4-Bay LCD Battery Charger for DIY Science Projects

The LiitoKala Lii-500 is a versatile, 4-bay intelligent battery charger and analyzer engineered to handle a wide array of rechargeable cell chemistries, including 3.7V Li-ion and 1.48V Ni-MH/Ni-Cd batteries. Operating via a 12V DC power input, this device features four independent charging channels that allow users to charge, test, and measure batteries simultaneously with custom current selections (300mA, 500mA, 700mA, and 1000mA). The integrated backlight LCD screen delivers real-time monitoring of crucial operational data, such as voltage (V), charging current (mA), elapsed time (h), accumulated capacity (mAh), and internal resistance (mR). Designed with multi-layer safety mechanisms, including overcharge, over-discharge, short circuit, and reverse polarity detection, the Lii-500 provides a reliable platform for evaluating battery health. Whether you are assembling power banks for a local Biggan Project, sourcing power for robotics in Bangladesh, or testing reclaimed cells for custom BD electronics circuits, the Lii-500 offers precise diagnostic capabilities. Please note: This product includes the Lii-500 charger main unit only; power adapters and batteries are not included.

Product Specifications

Key Features

• Four independent microcomputer-controlled channels for flexible, multi-chemistry charging.
• Clear LCD panel displaying voltage, current, duration, capacity, and internal resistance simultaneously.
• Selectable charging speeds ranging from 300mA to 1000mA per slot.
• Integrated capacity testing capabilities through FAST TEST and NOR TEST modes.
• Integrated 5V/1A USB output functionality to serve as a power bank using charged Li-ion cells.
• Smart detection system for zero-voltage activation, defective batteries, and reverse insertion.

Applications & Use Cases

• Testing and matching 18650 Li-ion cells for custom battery pack builds in school and college Biggan Project kits.
• Sourcing power for robotics, IoT devices, and microcontrollers used in Bangladesh tech labs.
• Diagnosing real capacity and internal resistance of stored AA/AAA Ni-MH cells for household equipment.
• Constructing portable DIY power banks using recycled cylindrical cells in local BD engineering workshops.

User Guide & Operating Instructions

• Connect a compatible 12V 2A DC power adapter to the DC input port of the charger.
• Insert rechargeable batteries into any of the four spring-loaded slots, matching polarity orientation.
• Press the mode button within 8 seconds of insertion to select between CHARGE, FAST TEST, or NOR TEST.
• Use the current selection button to cycle between 300mA, 500mA, 700mA, and 1000mA speeds based on battery rating.
• Monitor the LCD display during operation to view real-time charging status, capacity results, and cell parameters.

Frequently Asked Questions (FAQs)

• Q: Does this charger package come with a power supply or batteries?
  A: No, this unit includes the LiitoKala Lii-500 charger main unit only. A standard 12V 2A DC power adapter and batteries must be supplied separately.
• Q: Can I charge AA Ni-MH batteries and 18650 Li-ion batteries at the same time?
  A: Yes, each slot operates independently and automatically detects the inserted cell type to apply the correct charging voltage.
• Q: What is the difference between FAST TEST and NOR TEST modes?
  A: FAST TEST discharges the battery first and then fully charges it to estimate capacity quickly. NOR TEST fully charges the battery, discharges it completely to measure true capacity, and then fully recharges it.
• Q: Can I use this unit as a power bank?
  A: Yes, when loaded with charged 3.7V Li-ion batteries and disconnected from the DC input power, the USB port outputs 5V 1A for external mobile devices.

Challenges and Considerations

• Requires an external 12V 2A DC power source with a matching barrel plug for standard desktop operation.
• Internal resistance (mR) measurements are indicative and can vary based on terminal contact cleanliness and physical alignment.
• The 5V USB output power bank function works only when populated with 3.7V Lithium-ion cells, not Ni-MH batteries.

Compatibility

• 3.7V Li-ion Cylindrical Cells: 26650, 22650, 18650, 18490, 17670, 17500, 17355, 16340, 14500, 10440.
• Ni-MH / Ni-Cd Chemistries: AA, AAA, A, SC cylindrical batteries.
• Power Input: Any regulated 12V DC power supply delivering at least 2.0A output.

Future Enhancement Options

• Adding an optional 12V 2A AC-to-DC wall power adapter for standard wall-outlet operation.
• Pairing with a 12V car charger cable for portable power management during outdoor field testing.
• Integrating temperature monitoring sensors to safeguard high-current capacity tests.

Benefits

• Prevents battery degradation by allowing user selection of lower charging currents for small cells.
• Helps identify failing or degraded cells before they damage complex DIY circuits or battery packs.
• Provides a single desktop solution for both daily battery charging and technical capacity diagnostics.

Conclusion

The LiitoKala Lii-500 LCD Intelligent Charger stands out as an essential diagnostic tool for electronics enthusiasts, students, and technicians. Its multi-mode capabilities, detailed LCD metrics, and broad cell chemistry support make it a valuable utility for verifying battery performance in custom projects and everyday electronic devices across Bangladesh.

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