Product Description
The XTAR VC4 is a versatile and reliable 4-slot smart battery charger designed for both lithium-ion and nickel-metal hydride batteries. Featuring an innovative LCD gauge-style screen, it provides real-time, precise monitoring of charging status, battery voltage, charging current, and capacity. The charger supports independent four-slot charging, allowing you to mix Li-ion and Ni-MH batteries simultaneously. Equipped with XTAR's original 0V activation technology, it can revive over-discharged batteries. With robust safety protections like reverse polarity detection and automatic shut-off upon full charge, the VC4 offers a worry-free charging experience for your daily electronic devices.
Key Features
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Innovative LCD Gauge Screen: Displays key real-time data including battery voltage, charging current gear, battery capacity (mAh), slot number, and battery type at a glance.
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Intelligent 0V Activation: XTAR's original 0V activation feature safely revives batteries that have been over-discharged to low voltage, restoring them to a usable state.
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Independent Four-Slot Design: Each slot operates independently, supporting mixed charging of 3.6V/3.7V Li-ion and 1.2V Ni-MH/Ni-CD batteries without interference.
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Clear Safety Warnings & Auto Stop: The LCD screen clearly displays intuitive warnings: "Full" when fully charged, "null" if the battery is damaged, and "Err" if the battery is reversed. Charging automatically stops when fully charged.
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Extensive Battery Compatibility: Supports 3.6V/3.7V Li-ion batteries (10440 to 32650) and 1.2V Ni-MH/Ni-CD batteries (AAAA to D size). Note: It does not support protected 20700 and 21700 batteries.
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Comfortable User Experience: Features a simple one-button operation to view charging status. Long press the button for 1.5 seconds to turn off the screen backlight for low-light environments.
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Three-Stage Charging Algorithm: Utilizes a lifespan-optimized charging process (Trickle-CC-CV) for Li-ion batteries and a smart pulse charging process for Ni-MH batteries to ensure efficient and safe charging.
Product Parameters
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Product Model: XTAR VC4
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Input Power: DC 5.0V 2.1A (USB power supply)
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Charging Current Options: 0.5A (500±50mA) / 1.0A (1000±80mA)
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Charging Cut-off Voltage: 4.20V ± 0.05V (Li-ion) / 1.45V ± 0.1V (Ni-MH)
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Operating Temperature: 0 - 40°C
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Dimensions: L149 x W115 x H35 mm
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Net Weight: 210g
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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 Li-ion Sizes: 10440, 14500, 14650, 16340, 17335, 17500, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22650, 25500, 26650, 32650
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Supported Ni-MH/Ni-CD Sizes: AAAA, AAA, AA, A, SC, C, D
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Important Note: Cannot charge protected 20700 and 21700 batteries.
Applications
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Daily charging and maintenance of 3.6V/3.7V 18650 batteries for EDC flashlights and headlamps.
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Safe power replenishment for standard AA and AAA Ni-MH batteries used in remote controls, wireless mice, and digital cameras.
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Mixed battery charging for hobbyists managing both Lithium and Ni-MH power sources.
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Reviving and testing old or over-discharged batteries for emergency kits and outdoor gear.
Frequently Asked Questions (FAQ)
Q1: What is the maximum charging current of the XTAR VC4 charger?
A1: The XTAR VC4 offers two selectable charging current options: 0.5A (500mA) and 1.0A (1000mA). It supports up to 1A per slot when charging four batteries simultaneously.
Q2: What do the error messages on the LCD screen mean?
A2: The VC4 provides clear safety feedback via the LCD screen. "Full" means the battery is completely charged; "null" indicates the battery is damaged or cannot hold a charge; "Err" indicates you have inserted the battery with reversed polarity, which triggers automatic protection to stop charging immediately.
Q3: Can I charge a Li-ion battery and a Ni-MH battery at the same time?
A3: Yes. The VC4 features a completely independent 4-slot design. You can safely mix Li-ion batteries and Ni-MH/Ni-CD batteries in any slot without impacting charging performance.
Q4: Does the VC4 support charging protected 21700 batteries?
A4: No. According to the manufacturer's design, the XTAR VC4 does not support protected 20700 and 21700 batteries. Please be sure to check your battery specifications before use.
Q5: How does the 0V activation function work?
A5: If your lithium battery has been over-discharged to an extremely low voltage (near 0V) and cannot be charged by standard chargers, the VC4's 0V activation feature will attempt to apply a safe, low current to revive and reactivate the battery's internal protection circuit, often restoring it to a usable state.
