I have 3 Lumapower MRV SK Hunters. One is 6 years old and the others are about 3. The oldest one works great but the 2 newer ones are having the same problem. When you turn them on they only turn on for about 1 second and then turn off. I keep turning them on and off and they only turn on every few times and immediately turn off again. They are all using one 18650 battery. I bought them from Batteryjunction.
What's going on?
What's going on?