Gemini Lights 8000mAh 4 Cell Battery

Built with 21700 cells instead of 18650 cells they are slightly larger and heavier but come with a higher power to weight ratio. A durable outer shell made of high-strength polycarbon has yielded an increase in double the impact protection from the previous generation. The high durometer rubber end caps protect your frame. 

They have the standard 5.5x2.1mm round connector used to power the light but also have a USB-C plug to power your phone, Garmin, GoPro, or any other USB-powered device. You can use both at the same time. There is a fuel gauge on the side of the pack that with the push of a button tells you how much power you have left. They can be charged using either port using a 5V USB charger or an 8.4V wall charger.

SPECS:

• 4-Cell Battery 60Wh 7.4V 8000mAh
• Lithium-Ion 4000mAh Cells
• DC Port Input 8.4V, USB-C Input 5.0V
• DC Port Output 6.0–8.2V, USB-C Output 5.0V
• Onboard fuel gauge