Precaution of using the headlamp

1. Headlamp is a very important equipment, but the battery must be removed when not in use to avoid corrosion.
2. A few head lamps are waterproof or even water-resistant. If you think waterproof is very important, you can buy such waterproof bulbs, but it's best to be rainproof, because you can't control the weather in the wild
3. The headlamp base shall be provided with a comfortable cushion, some of which are hanging near the ear like a pen
4. The switch of the headlamp holder must be durable. Do not put it in the backpack, which will turn on automatically, waste electric energy or cause some problems. The switch of the lamp holder should be designed as a groove. If you think there will be problems during the travel, you'd better stick it close with a cloth, take out the bulb or take out the battery
5. The bulb is not durable for a long time. It is best to carry a spare bulb. For example, halogen, krypton and argon bulbs will produce heat and be brighter than vacuum bulb. Although the use will be high amperage and shorten the service time of the battery, most bulbs will identify the amperage at the bottom. However, the service life of the general battery is 4 amperes / hour, which is equal to 8 hours and 0.5 amperes.
6. It's best to test the light in a dark place when buying. The light should be white and the spotlight is better, or the one that can adjust the spotlight.
7. A method to check the LED: generally, three batteries are installed. First, two batteries are installed. The third section is evenly and permanently shorted with the key (compared with the headlamp without booster circuit), and the lighting time is relatively long (about 30 hours with famous brand [AA] battery). It is ideal as a camp lamp (that is, it is used in the tent); The disadvantage of headlamp with boost circuit is that this kind of headlamp has poor waterproof performance (most of them are not waterproof).
8.If you are climbing at night, it is better to use the headlamp of the bulb as the main light source, because its effective illumination distance is at least 10 meters (2 No. 5 batteries), and it also has normal brightness for 6 ~ 7 hours, and most of them can be rainproof. You don't have to worry about bringing two spare batteries for one night (don't forget to bring a spare flashlight, When changing the battery).