>> Mode Selection & Memory
The Alpha flashlight contains a LED driver with three power levels and "last level memory."
A button "press" requires very light pressure like the "half-press" used when focusing a camera. The light will turn on, but the button has not yet "clicked." The "press" also provides a momentary-on function.
A button "click" is audible, tactile, and occurs when the button is fully depressed. A "click" latches the light in the "on" state, and will not turn off until the button is "clicked" again.
The levels are accessed by repeatedly "pressing" the on/off switch. You can cycle the levels without "clicking" the button. The light will "remember" the last output level if the light is turned on (press OR click) for more than 2 seconds.
>> Low Battery Warning
The driver also has a "low battery warning." When the battery voltage drops to 3.2 Volts (or less) the light will switch to "low" mode and strobe once per second. This is an emergency mode. Deeply discharging the battery to this level reduces the cell's overall capacity.
The battery should not be depleted further. Doing so can cause permanent damage to the battery by activating the cell's "protection circuit" which disables the cell. A tripped protection circuit voids the warranty on your battery.
>> Battery Installation
The battery should be installed with the (+) terminal facing the head.
To remove the battery, always separate the head from the body.
The battery label is marked with (+) and (-) indicators. The LED driver contains a circuit to protect it from damage if the battery is installed backwards (reverse polarity).
If your light does not turn on, you probably put the battery in backwards. Check this even if you are "sure" the battery is inserted correctly. I know from experience that being "sure" doesn't mean that (+) is in fact facing front :)
Forget everything you know about rechargeable batteries. You can recharge the battery any time because there is no "memory" effect. In fact, recharging the battery before it's empty will prolong its useful life. Repeatedly discharging until the "low battery warning" is activated will cause permanent damage the battery.
When the status light on the charger is RED the battery is charging. When it's GREEN it's charged. The charger is "smart" so if you put a battery in the cradle and the light stays green...that means it's charged.
No one orders the maintenance kit but I guarantee you are going to need it.
It's kind of like buying a car and never expecting to change the oil. You don't have to use Nano-Oil but I won't recommend anything else. Nano-Oil is very expensive and I can't "include" it in the price of the light. However, it's pure magic. You should buy it.
Every effort should be made to keep the threads clean...laboratory clean. If you feel "grit" then don't thread the light together. You may permanently damage the precision threads. You are going to need to clean them.
Body threads: I like to use Simple Green or Windex (something that cuts grease) and an old toothbrush. Feel free to remove the o-ring while you do this...or not.
Head threads: Take a Q-tip and mash the end flat with a pair of pliers. This will allow the Q-tip to fit between the threads and the copper post that holds the LED driver. Run the Q-tip clockwise several turns and then back it out counter clockwise.
Window: Optics people call that front glassy thingy the light shines through a "window," not a lens. Be careful when you clean it because it has a special anti-reflective coating. If you get too aggressive you can damage it. I actually use my hot breath and camera lens papers. Some solvents may damage the coating, so I prefer not to use any.
When you are done, you MUST oil the threads and o-rings. If you don't oil the o-rings the light may become impossible to disassemble.