LiitoKala Lii-M4 Smart Battery Charger & Tester – 4-Slot LCD Screen Type-C Capacity Analyzer for Li-ion, NiMH

Overview 

Stop guessing the health of your rechargeable batteries with the LiitoKala Lii-M4 4-Slot Smart Battery Charger & Capacity Tester. Powering up via a convenient 5V Type-C USB port, this intelligent charging station features a high-visibility digital LCD matrix that breaks down real-time metrics for each battery independently. The standout feature is its dedicated “Test Mode”, which runs an automated mechanical sequence to measure the actual capacity of old or salvaged cells. Whether you are sorting through reclaimed laptop cells to build a custom solar power wall or keeping AA/AAA NiMH hobby cells balanced, the Lii-M4 provides laboratory-grade diagnostic metrics right on your desk.

Key Features ✨

• Four Independent Charging Bays: Mix and match different battery chemistries (Li-ion 3.7V, NiMH 1.2V, NiCd 1.2V) and sizes simultaneously without any cross-talk.

• True Capacity Test Mode: Fully charges, discharges, and recharges the cell to accurately read and log its true capacity in mAh, helping you weed out degraded, dead, or counterfeit batteries.

• Universal 5V Type-C Input: Runs off any standard smartphone charger, power bank, or laptop USB port (5V, ≥2A recommended), making it highly portable.

• Dedicated 5V USB Output Power Bank Mode: Slot 4 can act as a portable backup power bank! Slip in a charged 18650 cell, and you can charge your smartphone via the standard Type-A USB output port.

• Comprehensive Safety Protections: Outfitted with automatic over-charge and over-discharge detection, short-circuit mitigation, zero-volt battery activation (0V revamping), and reverse-polarity safeguards.

Technical Specifications 

Who is this for? 

• DIY Power Wall & Battery Pack Builders: Crucial for testing and grouping identical capacity cells before welding them together.

• Robotics Enthusiasts: Keeping standard AA NiMH or 14500 Li-ion development cells optimized and balanced.