So, are you suggesting (or implying) that IF it lasts 1.2x longer, that it meets the claim?
LOL... Well, that kind of deceptive claim is used all the time these days in all sorts of products across many diverse industries and it is rarely called out. You can even rig up a test that will show some ridiculous number of times longer battery life (like the GPS test
for exmple) and then claim that you were correct all along.
The simple
fact of the matter is that with most products, unless the Batteroo Sleeve is delivering significantly less power to the load than a plain cell would deliver, (
and this may be the case if the sleeve cannot deliver the current attempting to be drawn by the device!) over the operating time the sleeve will actually
DECREASE the total battery life, not increase it at all, despite the fact that you can show a gain in certain situations.
If a flashlight draws more current than the Batteroo Sleeve can muster (so it is now operating as a current limiter) and thus the actual operating power of the lamps is less, it is possible for it to extend the life, though the luminosity would be less, which is opposite to their claims of providing maximum performance for a longer time. You cannot "
have your cake and eat it too" in this situation. Either it ends up running the flashlight for a longer time at lower brightness (where you could have bought a "dimmer torch" in the first place; you're not the getting the full output that you expect from your device) than without the sleeve or it is going to run it for a shorter period of time.
Especially if the flashlight already
has the same kind of driver circuit in it... Which is what many people don't understand... The devices where the designer and manufacturer decided it was worth it to put in a converter,
they did. Are there some devices whose performance characteristics will be altered by the addition of that circuitry? Certainly. Will it deliver anywhere near the claimed increase in runtime at full performance that they state, for the vast majority of products? Not a chance.
Arrrrrr... The laws of physics be a harsh mistress, Matey!