XTAR VX4

XTAR VX4 V2: The True 4-in-1 Hybrid Charger

The XTAR VX4 V2 (often hailed as the "Visis" edition) is the ultimate problem-solver for anyone who owns a drawer full of different battery types. While most chargers claim to be "universal," the VX4 V2 actually lives up to the name by adding dedicated support for the new industry-standard 1.5V Li-ion cells.

One Charger to Rule Every Chemistry.

Think of the VX4 V2 as the "Swiss Army Knife" of power management. It doesn’t just charge batteries; it analyzes, revives, and optimizes them. Whether you are using traditional Ni-MH AAs, high-performance 18650s, stable LiFePO4 cells, or the latest 1.5V Li-ion rechargeables, the VX4 V2 handles them all in one go—no separate chargers required.

Why the VX4 V2 Stands Out

• The 1.5V Li-ion Specialist: Most "universal" chargers treat 1.5V Li-ion batteries like standard Ni-MH, which leads to incomplete charges. The VX4 V2 uses a dedicated charging protocol to ensure these cells reach their full potential safely.
• Grading Mode (Capacity Testing): Stop wondering which batteries are "duds." In Grading mode, the charger performs a full charge-discharge-charge cycle to show you the real capacity ($mAh$ or $mWh$) of your cells.
• USB-C PD 3.0 & QC 3.0 Input: No more bulky proprietary power bricks. Plug into any modern USB-C fast charger to unlock maximum speeds across all four slots.
• Adjustable Current (2.0A Max): You’re in the driver’s seat. Manually select between 0.25A, 0.5A, 1.0A, or 2.0A to prioritize either battery longevity or high-speed turnaround.
• Dual-Unit Display: View your battery’s energy in both Capacity ($mAh$) and Energy ($mWh$)—a must-have feature for accurately measuring 1.5V Li-ion performance.

Universal Compatibility

The VX4 V2 features extra-long independent slots (fitting batteries from 30mm to 75mm), making it compatible with almost everything on your shelf.

Safety & Intelligence

• Intelligent Identification: The VX4 V2 automatically detects battery chemistry and applies the optimal charging algorithm.
• Internal Resistance (IR) Testing: Measures the "health" of your battery. High resistance? It might be time to recycle that cell.
• 0V Activation: Revives over-discharged Li-ion batteries that other chargers would ignore.
• Multiple Protections: Over-charge, over-discharge, short circuit, and reverse polarity protection come standard.

Technical Specifications

• Input Power: USB-C (PD3.0 / QC3.0) 5V-3A / 9V-2A / 12V-1.5A
• Constant Current: 2A × 2 / 1A × 4 / 0.5A × 4 / 0.25A × 4
• Cut-off Voltage: $4.20 \pm 0.05V$ (Li-ion) / $3.65 \pm 0.05V$ (LiFePO4) / $1.45V$ (Ni-MH)
• Discharge Current: 300mA / 500mA
• Dimensions: 152mm x 121mm x 38mm