Using the Fenix HM70R headlamp is easy. First, insert the 21700 battery or the 18650 battery with the ALF - 18 battery holder into the headlamp. Then, turn it on using the large thumb - sized switch. You can switch between different light modes, like white, neutral white, and red lights. The red flash mode is great for getting attention.
When charging, use the hidden USB Type - C port. It supports a 2A charging current, so it won't take too long to charge.
For maintenance, keep the headlamp clean. Wipe it with a soft cloth after use. Avoid exposing it to extreme temperatures and moisture. If you drop it from a height more than 2 meters, check it for any damage before using it again. Also, when not in use for a long time, remove the battery to prevent any potential damage to the headlamp.