Universal Battery Charger for AA AAA 18650 21700 Rechargeable Battery | 4 Slot, Compact Small AA Charger with 2A/4A USB C Fast Charging Adjustable Current for 1.2v NiMH NiZn 1.5v Li-ion and More

One charger for the rechargeable batteries used throughout your day.

ISDT C4 Air is designed for households, flashlight users, photographers, RC and Mini 4WD hobbyists, and travelers who use several types of cylindrical rechargeable batteries. Use it for AA or AAA cells found in game controllers, toys, remote controls and camera flashes, or charge compatible lithium cells used in flashlights, headlamps and hobby equipment.

The compact 6-position layout combines two vertical positions for larger cylindrical cells with four horizontal positions for AA, AAA and other compatible sizes. Up to four batteries can be charged at one time. Each position is managed independently, allowing the charger to detect battery parameters and apply an appropriate charging configuration.

With a compatible USB-C PD or QC power source, the vertical positions support charging currents up to 4A and the horizontal positions support up to 2A. A built-in cooling fan helps maintain stable operation during higher-power charging.

For additional visibility and control, connect C4 Air to the Polying App through Bluetooth. Check charging progress, adjust available parameters and update the charger firmware from a compatible phone or tablet. Basic battery detection and charging are handled by the charger, while the app provides a larger control interface.

SUPPORTED BATTERY CHEMISTRIES

NiMH, NiZn, Li-ion, LiFePO4 and LiHV rechargeable batteries

SUPPORTED BATTERY SIZES

AAA, AA, 10440, 10500, 12500, 13500, 14500, 14650, 16650, 17650, 17670, 18650, 18700, 20650, 20700, 21700, 22650, 26650 and 26700

SPECIFICATIONS

Model: C4 Air

Maximum input power: 40W

Input voltage: 512V USB-C PD/QC

Horizontal charging current: 0.12.0A

Vertical charging current: 0.14.0A

Maximum batteries per charging session: 4

Horizontal position maximum battery length: 51mm

Vertical position maximum battery length: 72mm

Operating temperature: 32104°F / 040°C

Dimensions: 106 × 73 × 29mm

Weight: 115g

IMPORTANT

Use only compatible rechargeable batteries. Do not attempt to recharge disposable alkaline batteries. Confirm the battery chemistry, size and recommended charging current before use. Maximum charging performance requires a compatible PD or QC power source and a battery capable of accepting the selected current.