The LED flashlight battery is a little bit. Why is it very low?
Please check the battery voltage, if the battery resistance is too large, there will be open circuit, measuring voltage is normal, once the access to LED, the voltage will drop rapidly, resulting in LED brightness is not enough.
Take apart, look at the driver, measure the current
Led normal lighting voltage is about 3.3V, below this voltage, the brightness will be significantly dimmed.
