[AtlasBarfed]

Other sources say 4000 cycles in one year of testing and the battery is still going strong. Apparently they used some chemical vapor deposition to dope sulfur in a carbon mesh, and apparently gamma sulfur was created in the process, which was accidental, they're trying to determine why their process created it.

Claim 3x the capacity of current lithium ion. That would be, what 600 wh/kg? 750? That seems unbelievable.

[jillesvangurp]

4000 cycles is pretty impressive. Worth pointing out just how good that is: if you fully charge the battery every day of the year, that would mean close to 11 years of very intensive use. 4000 times a typical maximum range of 250 miles would mean driving a million miles. Some taxis get that kind of mileage of course. But most drivers would take quite a bit of time to get there.

In short, if you are lucky enough to own a vehicle with such a battery, it needing replacement is not going to be an event that you should have to worry about for decades if you drive it normally. Which would mean doing about 14K miles per year; or about 71 years.

[_0w8t]

The energy density is the reason Li-S batteries are researched in the first place. Other prototypes of Li-S batteries according to Wikipedia already archived 450 Wh/kg.