I am going to estimate some numbers based upon what LIS has...

I am going to estimate some numbers based upon what LIS has disclosed.

In its 7 July Newsletter it said about the lithium sulphur batteries used in its drone test flight: "Our Li-S cells achieved over 2.2x the gravimetric energy density compared to the original cells supplied with the drone." I am not certain who the manufacturer of the drone is, but I am assuming the cells provided with it are completive in the marketplace for that type of use.

Later in the Newsletter the generic comment is made that "lithium sulphur batteries typically have a gravimetric energy density of 200 Wh/kg or less, whereas lithium sulphur batteries have the potential to reach well over 400 Wh/kg."

My assumption for the following calculations is that the original cells supplied with the drone had a geometric energy density of 200 Wh/kg.

Therefore, the LIS lithium sulphur batteries in the original test flight would have had a capacity of 440 Wh/kg (i.e., 2.2x the original cells as reported by LIS).

Now, as reported today, if the latest cells with increased active material content result "in a 400% increase in total energy stored", this would suggest that the new LIS cells have a gravitational energy density of 2,200 Wh/kg (being a 400% increase over 440 Wh/kg).

Here, I am literally assuming that "400% increase in total energy stored" has precisely the same meaning as "400% increase in gravimetric energy density". If this is wrong, then my calculation will be wrong too. But, on the face of it, the two seem to have the same meaning.

If the above is remotely accurate that the new LIS drone test cells have a gravimetric energy density of 2,200 Wh/kg, then this in my view would be an extremely positive technological result to put it mildly, and way beyond my own expectations.

It almost seems too good to be true, but this is what the numbers seem to imply. What do people think? Is this what LIS is saying or are my calculations muddled? If the calculations are accurate then LIS could be much further on the way to commercialisation than is generally recognised. But if it is the latter, why does not LIS properly disclose this to the market? And if it is the latter the stock is cheap.