To buy a bright flashlight, you need to look at these aspects:
1. Look at the material, aluminum alloy or titanium alloy is better, but titanium alloy is too expensive and not bad for the money.
2. Look at the lamp beads, a good flashlight must choose a good core.
3. To see whether the structure is reasonable, a good structure is more durable and reliable, not to mention its beautiful appearance.
4. Check whether the circuit board is constant current, the brightness of the constant current circuit is constant, and the protection of the lamp is good.