ISDT C4 Air — Universal Smart Charger for Cylindrical Batteries
The ISDT C4 Air is a compact and intelligent universal charger designed for a wide range of cylindrical rechargeable batteries. With its flexible slot layout, USB-C input, app-based control and support for many battery sizes and chemistries, the C4 Air is a practical charging solution for hobby, workshop, household and professional accessory use.
The charger features a smart 6-slot layout with both horizontal and vertical battery positions. The horizontal slots are ideal for AA and AAA batteries, while the vertical slots support larger cylindrical cells up to 26700 size. This makes the C4 Air suitable for a much wider range of rechargeable batteries than standard AA/AAA chargers.
Depending on the battery type and size, the C4 Air can charge up to four cylindrical batteries at the same time. Each charging process is managed intelligently, with automatic charging parameter adjustment to help achieve safe and efficient charging performance.
The ISDT C4 Air supports multiple battery types, including NiMH, NiZn, Li-Ion, LiFe and LiHv batteries. This wide compatibility makes it useful for many applications, from transmitters, tools and accessories to flashlights, portable devices and other battery-powered equipment.
Instead of a built-in display, the C4 Air uses wireless app connectivity for a more modern and convenient user experience. Through the mobile app, users can view detailed charging information, monitor battery status and adjust settings with a larger and clearer interface.
The USB-C input interface supports QC and PD fast charging protocols, with a maximum input power of 40W. This allows the charger to be powered by compatible USB-C adapters, computers, power banks and other suitable USB power sources.
For stable operation during faster charging, the C4 Air is equipped with an integrated micro fan. Combined with multiple protection functions and intelligent power management, this helps support reliable charging performance in a compact housing.
Compact, versatile and app-connected, the ISDT C4 Air is an excellent smart charger for users who need one practical charger for many different cylindrical battery types and sizes.
Key Features:
- Universal smart charger for cylindrical rechargeable batteries
- Flexible 6-slot layout with horizontal and vertical battery positions
- Charges up to four cylindrical batteries at the same time
- Horizontal slots suitable for AA and AAA batteries
- Vertical slots support larger cells up to 26700 size
- Supports NiMH, NiZn, Li-Ion, LiFe and LiHv batteries
- Wireless app connectivity for monitoring and control
- App-based interface instead of built-in display
- USB-C input interface
- Supports QC and PD fast charging protocols
- Maximum input power: 40W
- Charging current up to 2.0A in horizontal slots
- Charging current up to 4.0A in vertical slots
- Automatic charging parameter adjustment
- Multiple battery protection functions
- Integrated micro fan for active cooling
- Compact and lightweight design
Technical Specifications:
|
| Model | C4 Air |
| Maximum input power | 40W |
| Number of batteries per charge | 1–4 cylindrical batteries |
| Supported battery types | NiMH, NiZn, Li-Ion, LiFe, LiHv |
| Supported battery sizes | AAA, AA, 10440, 10500, 12500, 13500, 14500, 14650, 16650, 17650, 17670, 18650, 18700, 20650, 20700, 21700, 22650, 26650, 26700 |
| Maximum horizontal battery size | 51 mm |
| Maximum vertical battery size | 72 mm |
| Operating voltage range | 5–12V |
| Fast charging protocol support | QC / PD compatible |
| Charging current range, horizontal slots | 0.1–2.0A |
| Charging current range, vertical slots | 0.1–4.0A |
| Operating temperature | 0°C to 40°C |
| Dimensions | 106 x 73 x 29 mm |
| Weight | Approx. 115 g |
Package Content:
- 1 x ISDT C4 Air Smart Charger
Remarks
