1, moderate head. Home generally do not exceed 12 hours, using battery on 2~3 better, again a bit of a waste, can be determined as needed for other special needs.
2, welded to prison. Each diode are solder connections on the circuit board, if there is a cold solder joint contact is not good, on the possible impact is not lit or the overall application.
3, buld spotlight as soon as possible on one point. This flashlight is not like an ordinary flashlight you can adjust the focus, when you purchase should be careful not to have astigmatism.
4, power switch contacts significantly. This flashlight uses a rotary switch, tighten, and then loosen off, if the contact is not obvious, it is very easy to create when killing phenomenon.
5, waterproof. Because it belongs to the electronic products, flashlights have a circuit board on the front, once prone to short circuit the water, causing damage.