battery has a power saving/safety function which allows you to turn on and off
the battery. In the “off” mode, the battery will not function. To turn on the
battery, press the recessed fire button 5 times in 3
seconds, the fire button flashes 3 times. The battery is now ready to use. To
turn off the battery, press the fire button 5 times in 3 seconds. The fire
button flashes 3 times and the battery is off. When the battery power is low the
fire button flashes 15 times indicating the battery needs charging.