Product Description
The XTAR VC4SL is a high-performance 4-slot smart battery charger engineered for both everyday users and battery enthusiasts. Combining a user-friendly LCD interface with advanced charging algorithms, it supports 3A QC3.0 fast charging via a Type-C port. Going beyond basic charging, the VC4SL features professional-grade testing capabilities, including accurate Capacity Grading to reveal true battery health and Internal Resistance (IR) testing to identify aging cells. Its Storage Mode intelligently charges or discharges batteries to their optimal long-term storage voltage, effectively extending battery lifespan. With a flexible spring-loaded design, it safely accommodates 3.6V/3.7V Li-ion batteries (from 10440 to 32650) and 1.2V Ni-MH/Ni-CD batteries (AA/AAA/SC/C), ensuring a truly comprehensive charging station for all your power needs.
Key Features
-
Advanced LCD Display Interface: Features a clear LCD screen that displays real-time charging progress, input capacity (mAh), charging current (mA), and internal resistance (mΩ) for all 4 slots simultaneously.
-
QC3.0 3A Fast Charging: Equipped with a widely compatible Type-C port supporting QC3.0 input (9V/2A). Provides a powerful 3A single-slot fast charge for Li-ion batteries.
-
Three Professional Battery Modes: Easily switch via the "Mode" button between Charging mode, Capacity Grading mode (a full charge-discharge-charge cycle to test true mAh capacity), and Storage mode.
-
Built-in Internal Resistance Test: Can accurately measure the internal resistance (IR) of the battery. This feature helps users identify weak, aged, or damaged cells before they fail in critical devices.
-
Ultra-Precise Voltage Control: Features a high-accuracy charging cut-off voltage of 4.20V ± 0.05V for Li-ion and 1.45V ± 0.1V for Ni-MH. The Storage mode automatically regulates the battery to an optimal 3.7V (Li-ion) or 1.2V (Ni-MH) storage voltage to prevent degradation.
-
Extensive Battery Voltage Compatibility: The intelligent identification chip automatically recognizes 3.6V/3.7V lithium-ion batteries and 1.2V Ni-MH/Ni-CD batteries.
-
Advanced Safety Protections: Implements a dedicated three-stage charging algorithm (Trickle-CC-CV) for Li-ion batteries. Features reverse polarity protection and an automatic stop when fully charged, with the screen flashing "FULL" to confirm.
-
Portable and Compact Design: Features a streamlined, compact form factor measuring 156 x 115 x 35mm, weighing 212g. Includes a Type-C cable, manual, and premium travel storage pouch.
Product Parameters
General Specifications:
-
Product Model: XTAR VC4SL
-
Input Power: QC3.0 Type-C (9V/2A)
-
Constant Charging Current: 3Ax1 / 2Ax2 / 1Ax4 / 0.5Ax4 / 0.25Ax4
-
Charging Cut-off Current: ≤120mA
-
Operating Temperature: 0°C - 40°C
-
Dimensions: L156 x W115 x H35 mm
-
Net Weight: 212g
Voltage Specifications:
-
Input Voltage: 9V (QC3.0)
-
Compatible Battery Voltage: 3.6V / 3.7V (Li-ion), 1.2V (Ni-MH/Ni-CD)
-
Charging Cut-off Voltage: 4.20V ± 0.05V (Li-ion) / 1.45V ± 0.1V (Ni-MH)
-
Optimal Storage Voltage: 3.7V (Li-ion), 1.2V (Ni-MH)
Supported Battery Types & Sizes:
-
Supported Types: 3.6V / 3.7V Li-ion (IMR/INR/ICR) and 1.2V Ni-MH/Ni-CD
-
Supported Li-ion Sizes: 10440, 14500, 14650, 16340, 17335, 17500, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22650, 25500, 26650, 32650 (Flat Top)
-
Supported Ni-MH/Ni-CD Sizes: AAA, AA, A, SC, C
Applications
-
Professional maintenance and charging for high-performance EDC tactical flashlights and headlamps.
-
Capacity sorting and testing for 18650/21700/26650 batteries used in RC drones and hobby electronics.
-
Extending the life of 1.2V AA/AAA Ni-MH batteries commonly used in remotes, wireless mice, and digital cameras.
-
Pre-conditioning batteries for storage in emergency kits, outdoor survival gear, and power banks.
Frequently Asked Questions (FAQ)
Q1: What is included in the package?
A1: The package includes 1x XTAR VC4SL Smart Charger, 1x Type-C Fast Charging Cable, 1x User Manual, and 1x Convenient Storage Pouch.
Q2: Can I charge protected 21700 batteries with the VC4SL?
A2: Yes. The VC4SL features an extendable spring-loaded battery bay specifically designed to accommodate protected 20700 and 21700 batteries safely and easily.
Q3: What exactly is the "Capacity Grading" mode?
A3: Capacity Grading mode runs a full cycle: the charger first charges the battery to full, then discharges it completely, and finally recharges it to full. This accurately measures the battery's real capacity (mAh), helping you discard aging batteries that no longer hold their rated charge.
Q4: What is the "Storage Mode" used for?
A4: If you do not plan to use a battery for a long period, the Storage Mode will automatically charge or discharge it to its optimal long-term storage voltage (3.7V for Li-ion, 1.2V for Ni-MH). Maintaining batteries at this specific voltage significantly prevents capacity loss and extends their overall lifespan.
Q5: How do I achieve the maximum 3A fast charging speed?
A5: To reach a 3A fast charging current, you must use a compatible QC3.0 (9V/2A) power adapter and charge only a single battery in one of the slots. The charger will automatically detect the input voltage and adjust the current accordingly.
