Smart Multifunctional Charger

LiitoKala Lii‑402 Smart Multifunctional Charger is a compact four‑slot battery charging solution designed for common cylindrical rechargeable cells used in electronics, DIY projects, and portable power systems. This intelligent battery charger supports both Li‑ion and Ni‑MH chemistries simultaneously while managing each slot independently through an onboard microcomputer control system. Adjustable charging current options and automatic battery detection simplify operation while maintaining stable performance. LED indicators clearly display charging progress and battery status, making this multi‑slot charging station suitable for makers, electronics hobbyists, and small lab environments that require reliable everyday battery management.

Independent Four‑Slot Smart Charging

Four fully independent charging channels allow different battery types or capacities to charge simultaneously without affecting neighboring slots. Automatic chemistry recognition detects Li‑ion and Ni‑MH cells, while manual selection enables optimized charging for LiFePO4 and 3.85V lithium batteries. Each slot is controlled by an internal microcomputer management system that regulates current and monitors charging conditions, providing stable performance across common cylindrical battery sizes such as 18650, 26650, 14500, and more.

Selectable Charging Current with LED Status Display

This intelligent charging unit provides four selectable current modes: 500mA, 700mA, 1000mA, and 2000mA, enabling flexible charging speed depending on battery capacity or thermal requirements. A four‑segment LED indicator system clearly displays charging progress at 25%, 50%, 75%, and 100%. Visual indicators also reveal battery detection status and operating conditions, allowing quick monitoring without external measurement tools.

USB Powered with Integrated Safety Protection

A Micro USB 5V power input enables convenient operation from common USB adapters, power banks, or computer ports. Built‑in protection circuitry safeguards connected batteries through over‑charge protection, over‑discharge protection, short‑circuit protection, reverse polarity detection, and damaged battery identification. This compact lithium battery charging dock therefore provides both convenience and operational safety for everyday rechargeable battery maintenance.

Figure: Ni-MH (1.2V)

Figure: Charging indicator example

Figure: Battery slot status display

Figure: Charger operation display

Note: After charging one battery type, disconnect the power supply before charging a different battery chemistry. Charging current cannot be changed once charging has started. To modify current or battery type, disconnect the USB power and reconnect before setting the new charging parameters.

This multi‑chemistry battery charger is suitable for maintaining rechargeable cells used in flashlights, DIY battery packs, portable electronics, robotics projects, and backup power systems. Flexible current selection, clear LED feedback, and universal USB input make the charger a practical charging tool for workshops, maker spaces, and electronics labs.