Using this head torch mount is easy. First, take the D4V2 GoPro head torch mount from this listing and attach it to your helmet. Then, install the EMISAR D4V2 SST - 20 torch onto the mount. Next, insert either an 18650 3000mAh 35a or an 18650 3500mAh battery into the torch and charge it using the 18650 charger. Finally, use the GoPro mounting set to secure everything in place. When using the mount, make sure the connections are tight to avoid any movement. Don't expose the mount and torch to extreme temperatures or moisture. For maintenance, clean the mount and torch regularly with a soft, dry cloth. Check the battery and charger for any signs of damage periodically.