Well . . . I reconsidered and ordered a new battery for my old Tigerlight . . .
Now, gotta' remove the old battery and install the new one.
Anyone have a link giving detailed instructions for this installation. I sure would hate to create a problem doing this installation . . .
I was in the same boat earlier this year. The Tigerlight FBOP (short version) I had bought around 4 years ago barely put out as much light as a MiniMag light. I tried another lamp assembly, same output, so I knew it had to be the battery. I was also turned off by the high price of the Tigerlight batteries, as I only paid around $90-100 for the light IIRC. I too ended up ordering the battery pack from Tigerlight, and althought the price hurt, I'm happy to have a functioning Tigerlight again, and this time I'll ba bit more careful with charging the battery (old style "dumb" charger), and hopefully this battery will last at least 3-4 years.
Swapping out the battery is very easy. You unscrew the bezel ring at the top by the lense. Remove the ring and the lense, then carefully pull the lamp assembly out, along with the rubber shock insulator. Lightly tap/shake the light and the battery pack should start to slide out. There are wires coming from the switch down by the tailcap, one set for the lamp assembly, the other for the battery, which connects with a 9V battery type connector. Unsnap the old battery, connect the new one, assembly is the reverse, and you're good to go.