Those "hobby" cells are small and hold a lot of energy for the size. For now, I staying with standard round cells -- I think these will do fine.
Thanks for the update on cell technology however. Those may someday make for small POWER!!!
My particular laser and driver requires a single 28 to 34 volt DC supply providing 12 AMPS! These 8 cells at full charge have 33.6 volts and easily light it up. If I turn down the PWM driver, it will drop to about 6 Amps and ~ 3 Watts output.
I'm now to the point of determining the focus adjustments for my 2.5x and 4x expanders. It is difficult because the paper targets start burning in the house before I get the spot size set :eg: I have set fire to cardboard at 35' with the "long" expander.
I also need to add the targeting laser and maybe a fan.
The beam will burn without focusing -- about a 0.2" dot. A 5" FL lens is good for close up stuff.
I build my expanders. The 2.5x expander is shown on the front in the picture.
Remember, use ZnSe "glass" lenses. They are yellow colored.