Product Description
The XTAR VC4 Plus is a flagship 4-slot multifunctional smart battery charger designed for both 3.6V/3.7V Li-ion and 1.2V Ni-MH/Ni-CD cylindrical batteries. Equipped with a high-contrast LCD screen, it delivers real-time charging data including capacity, current, internal resistance, and precise voltage. Powered by a 9V QC3.0 USB Type-C input, it supports a maximum 3A fast charge in single-slot mode. Beyond standard charging, the VC4 Plus offers professional maintenance features: 0V activation to revive over-discharged batteries, capacity testing to measure true battery health, and a storage mode that automatically charges or discharges batteries to their optimal long-term storage voltage (3.7V for Li-ion, 1.2V for Ni-MH). Smart temperature control and global safety certifications guarantee secure and reliable charging.
Key Features
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Advanced LCD Display: Simultaneously displays real-time charging capacity (mAh), current (mA), internal resistance (mΩ), and operational modes across all 4 slots.
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QC3.0 Fast Charging with Voltage Adaptability: Supports input voltage of 9V (QC3.0) for up to 3A single-slot charging; automatically adjusts power output for 2A dual-slot and 1A/0.5A four-slot configurations.
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Ultra-Precise Voltage Regulation: Provides highly accurate charging cutoff voltages of 4.20V ± 0.05V for Li-ion batteries and 1.45V ± 0.1V for Ni-MH/Ni-CD batteries to prevent overcharging.
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Broad Voltage Compatibility: Directly supports 3.6V/3.7V lithium-ion cells (10440 to 32650) and 1.2V nickel-metal hydride/nickel-cadmium cells (AAA, AA, A, SC, C).
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Intelligent Charging Algorithms: Employs TC-CC-CV (Trickle-Constant Current-Constant Voltage) for Li-ion and precise pulse charging with -ΔV and 0ΔV detection for Ni-MH, ensuring a full charge without damage.
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Advanced Battery Care Modes: Includes 0V activation to rescue dead batteries; Capacity Test mode (charge-discharge-charge) to reveal true capacity; Storage mode for maintaining batteries at safe storage voltage to prolong lifespan.
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Comprehensive Safety Certifications: Built-in temperature control, short-circuit protection, and overcurrent protection. Certified with RoHS, CE, and FCC, and covered by global insurance.
Product Parameters
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Brand & Model: XTAR VC4 Plus
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Input Power: QC3.0 USB Type-C (9V ⎓ 2A, 18W Max)
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Voltage Specifications:
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Charging Cut-off Voltage: 4.20V ± 0.05V (Li-ion) / 1.45V ± 0.1V (Ni-MH)
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Compatible Battery Voltage: 3.6V / 3.7V (Li-ion), 1.2V (Ni-MH/Ni-CD)
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Long-term Storage Voltage: 3.7V (Li-ion), 1.2V (Ni-MH)
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Charging Current Output: Single Slot 3A Max / Dual Slot 2A Max / Four Slot 1A or 0.5A Max (per slot)
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Charging Cut-off Current: ≤120mA
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Operating Temperature: 0 - 40°C
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Product Dimensions: L156 x W115.5 x H35 mm
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Supported Battery Types: 3.6V/3.7V Li-ion (IMR/INR/ICR), 1.2V Ni-MH/Ni-CD
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Supported Battery Sizes (Li-ion): 10440, 14500, 14650, 16340, 17335, 17500, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22650, 25500, 26650, 32650 (Flat Top)
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Supported Battery Sizes (Ni-MH): AAA, AA, A, SC, C
Applications
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Charging high-drain 3.7V 18650/21700 batteries for EDC flashlights and tactical lights.
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Providing reliable 1.2V power sources for outdoor headlamps and camping lanterns.
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Managing power for remote control (RC) toys and drones.
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Daily maintenance and charging for 1.2V Ni-MH AA/AAA batteries used in digital cameras, wireless microphones, and game controllers.
Frequently Asked Questions (FAQ)
Q1: What are the exact charging cutoff voltages for Li-ion and Ni-MH batteries?
A1: The XTAR VC4 Plus is calibrated to a highly precise charging cutoff voltage of 4.20V ± 0.05V for 3.6V/3.7V Li-ion batteries, and 1.45V ± 0.1V for 1.2V Ni-MH/Ni-CD batteries to ensure maximum capacity without overcharging risks.
Q2: How do I achieve the maximum 3A charging speed?
A2: To achieve 3A fast charging, you must use a QC3.0 (9V/2A) or higher power adapter, and charge only one battery in a single slot. The charger will automatically adjust the output voltage and current based on the battery type.
Q3: What does the "Storage Mode" do regarding voltage?
A3: Storage Mode intelligently charges or discharges the battery to its optimal long-term storage voltage (3.7V for Li-ion, 1.2V for Ni-MH). Maintaining batteries at these specific voltages significantly prevents capacity degradation during prolonged inactivity.
Q4: What is the "0V Activation" feature?
A4: Over-discharged batteries may drop to 0V and fail to charge in regular chargers. The VC4 Plus features 0V activation, which applies a safe low-voltage current to gently revive and awaken these dead cells, restoring them to a usable voltage level.
Q5: Can I mix different voltage batteries (3.7V and 1.2V) in the slots?
A5: Yes. The VC4 Plus features independent circuit control for each slot, allowing you to simultaneously charge a 3.7V Li-ion battery in one slot and a 1.2V Ni-MH battery in another without any electrical interference.
