Cyansky BL1834U, 3400mAh, Protected, USB C Port

These are only available to those who have purchased the Cyansky HS6R.
 
This 18650 has a USB C port on the side, so you can charge spares outside of the headlamp.
 
Price is per battery

Specs:

- Model: BL1834U
- Brand: Cyansky
- Typical capacity: 3400mAh
- Nominal voltage: 3.7 V
- Charging voltage: 4.20
- Max Charging Current: 2A
- Discharging end voltage: 2.5V
- Continuous discharging current: 10A
- Protected: Yes. over-charge, over-discharge protections.
- Size: 18.4mm x 70.2mm
- Weight: 51g