Olight's new 2.4v battery - what's in it?

[Correllux]

@def_nvar

the light only has a boost converter, so to use li-ion you need to convert to less than LED drive voltage.
the battery has a buck converter so it can output a voltage lower than its discharged voltage.
converting 3.7 -> 2.4 -> 3.0 is more efficient than 3.7 -> 1.5 -> 3.0 because of smaller difference of voltages.
You waste less energy and generate less heat, which is great for the Li-Ion cell.
also, for same power, higher voltage = less current. this means they can use smaller conductors (not an issue here) and smaller components (enables more volume inside the battery to be used by the Li-Ion cell instead of the buck converter).
Or you could make a buck converter that can handle more current but I doubt it’s what they did here.

Using a buck converter battery will give you constant output until the end but also means you can’t measure the cell voltage and at the end of discharge, the light will simply “drop dead”.

This battery can probably be used with any single AA light (because they use a boost converter) but it would damage devices that can’t handle the voltage.

as a battery exclusively for 1xAA lights, this one is actually pretty clever.

Well now that’s interesting. I’d have never thought about a two stage conversion process like that, but it does make sense. Is this just theory or do you know that this is how their cell/circuit is working in this light?

Certainly clever, does seem a bit over the top in terms of complexity and cost vs. our usual approaches. And still with the somewhat lackluster performance from a cold white emitter….so.