These high quality cables are for use with the new 4000mAh and 8000mAh Gemini batteries.

USB-A to USB-C
Used to charge the battery from a USB-A port or charger. One is included with the charger in each new light set.

USB-C to USB-C
Used to charge the battery from a USB-C port or charger. USB-C is becoming the standard with most new laptops and devices. This cable can also be used to power USB-C devices.

USB-C to Lighting
Used to charge an Apple device like an iPhone or iPad.

USB-C to Micro-USB
Used to charge a Android phone, Garmin or other device using a Micro-USB port. 

USB-C to USB-A Adapter
To use your current USB-A cables get this adapter to change the battery's USB-C port to a USB-A