1. Product Overview
The ISDT C4 EVO is a versatile 6-bay smart battery charger designed for a wide range of rechargeable batteries. It features independent charging channels, a full-color LCD screen for real-time monitoring, and multiple professional working modes to optimize battery performance and longevity. With its 36W Type-C input, it offers rapid and efficient charging.
2. Package Contents
- 1 x ISDT C4 EVO Charger
- 1 x USB-C Cable
- 1 x User Manual (this document)
3. Key Features
3.1 Battery Compatibility
This universal charger supports a broad spectrum of rechargeable batteries, including Lithium-ion, Ni-MH, Ni-Cd, Ni-Zn, LiHV, and LiFePO4. It accommodates various sizes from AAA and AA to 16650, 18650, 21700, and 26700. After firmware update V2.0.0.1 or above, it also supports 1.5V Li-ion batteries.
Note: Ni-Zn/LiHV batteries require manual battery type selection. C/D and 9V rechargeable batteries are not supported.
3.2 Rapid Charging
Equipped with a 36W Type-C input, the C4 EVO offers adjustable charging currents. Each horizontal slot can deliver up to 3.0A, while vertical slots provide up to 1.5A for simultaneous multi-battery charging. For optimal performance, use an 18W or higher fast-charging adapter. 5V2A power sources are not recommended.
3.3 Smart Operating System
The charger features a large, full-color LCD screen that displays real-time charging progress and detailed statistics for each battery. Its user-friendly graphical interface allows for easy navigation and adjustment of screen brightness and charging tone alerts.
3.4 Professional Working Modes
Beyond standard charging, the C4 EVO offers advanced functions for comprehensive battery maintenance:
- Charge: Standard battery charging.
- Discharge: Discharges batteries to a set voltage.
- Storage: Prepares batteries for long-term storage by charging/discharging to an optimal voltage.
- Cycle: Charges and discharges batteries multiple times to determine actual capacity and improve performance.
- Analyze: Measures battery capacity and internal resistance.
- Refresh: Revitalizes older batteries by cycling them.
- Destroy: Safely discharges batteries to 0V for disposal.
3.5 Multiple Security Protections
The charger incorporates several safety features to ensure secure operation and extend battery life:
- Overcharge Protection
- Over Discharge Protection
- Short Circuit Protection
- Reverse Polarity Protection
- Overheating Protection
- Timeout Protection
3.6 USB Type-C Input
The charger utilizes a USB Type-C input, supporting QC2.0/3.0 and PD fast charging protocols. It can also be powered by a laptop USB port for convenience.
3.7 Firmware Upgradability
The firmware can be updated via the USB-C interface when connected to a computer, ensuring access to the latest features and optimal performance.
4. Setup and Operation
4.1 Connecting the Charger
- Connect the provided USB-C cable to the charger's input port.
- Plug the other end of the USB-C cable into a compatible power adapter (18W or higher recommended) or a laptop USB port.
4.2 Inserting Batteries
Carefully insert rechargeable batteries into the appropriate slots, ensuring correct polarity. The charger's independent slots allow for simultaneous charging of different battery types and sizes.
4.3 Automatic Detection and Manual Settings
The C4 EVO is designed to automatically detect the chemistry of the inserted battery and set an appropriate charging current. However, for Ni-Zn/LiHV batteries, manual selection of the battery type is required. Users can also manually adjust charging current (up to 3.0A per horizontal slot, 1.5A per vertical slot) and stop voltage (up to 4.30V) for specific needs.
4.4 Understanding the Display
The LCD screen provides comprehensive real-time data:
- Cell Voltage and Charge Current
- Charged Capacity (mAh)
- Operation Timer
- Cell Temperature
- Internal Resistance (mΩ)
- Input Voltage and Power
4.5 Important Operating Note
Some heat buildup during fast charging is normal. To reduce battery temperature, you may lower the charging current to 0.6A or below. The default current setting is 1.5A.
5. Specifications
- Product Dimensions: 4.72 x 3.62 x 1.34 inches (120 x 92 x 34 mm)
- Item Weight: 9.1 ounces (0.26 Kilograms)
- Output Voltage: 5 Volts (DC)
- Input Power: 36W Type-C (5~12V input)
- Max Charging Current: 3.0A (horizontal slots), 1.5A (vertical slots)
- Supported Battery Types: Li-ion, Ni-MH, Ni-Cd, Ni-Zn, LiHV, LiFePO4
- Supported Battery Sizes: AAA, AA, 16650, 18650, 21700, 26700, etc.
- Specification Met: FCC
6. Troubleshooting
6.1 Inaccurate Voltage Readings
While the C4 EVO provides detailed information, external measurements with a calibrated multimeter may show slight discrepancies. This is common across various chargers. For precise measurements, always refer to professional-grade testing equipment.
6.2 Limited Discharge Stop Voltage
The discharge stop voltage is limited to 2.90V. If you require discharging to lower voltages (e.g., 2.6V-2.7V for full capacity testing of some Li-ion cells), an alternative discharge method or device may be necessary.
6.3 Charger Not Powering On / Slow Charging
Ensure you are using an adequate power source. The charger requires a 36W Type-C input, and an 18W or higher fast-charging adapter is recommended for optimal performance. 5V2A power sources may result in slow charging or insufficient power for multiple batteries.
7. Official Product Video
8. Warranty and Support
The ISDT C4 EVO Charger comes with a 1-year warranty. For dedicated customer support and to download the latest firmware updates, please visit the official ISDT website.
