You can put a 1.5ohm atty on that 5v PV and it doesn't fry the atty? If so, I'd love to know how.....
Calling it a '5V' PV is a stretch. It's just a two 3.7V cell tube mod with a 1Ω resistor.
Seeing as it's not IC regulated you can't just use Ohm's Law to figure watts/volts as that would not account for what the batteries can
actually deliver in a real world use. And you would get different (measured) results based on what
brand of batteries you have chosen. None of this can be accounted for by just using the theoretical numbers that Ohm's Law would give us. You definitely would not use 5V as a base for calculations.
If we take a standard 14500 with a 1.5Ω atty what are the watts? Using Ohm's Law, 3.7V @1.5Ω we get 9.1W. Ain't gonna happen as we need 2.5A which the 14500 can't provide. Do a real load test and you'll find the watts to be closer to 6.7W. Slap that same atty on a 26650 and your actual watts will be at about ~11W. Those babies ain't sagging they aren't even breaking a sweat. What ever the LR atty wants they can deliver.
If I wanted to predict GLV2 numbers I guess I would start with 7.4V (the 2 cells), factor in the the 1Ω resistor + the atty. My calculations would put a ~2.5Ωish atty/cartos at about ~5.3 volts and a 1.5Ω atty at about
4.4V. But that would only work out if the 7.4V was a regulated power source, which it is not. The batteries will sag under the LR current demands, the only way to know is to actually test/measure them them. I would expect
at least a 10% hit. And depending on the cells, UltraFires, TrustFires, AW Li-ions, IMR high drains, and their age, the 'hit' could vary considerably.