NanoGraf Technologies claims it has developed the highest energy-density cylindrical 18650 Lithium-ion cell in the world, with an energy-density of 810 Wh/L (4.0Ah capacity).
"Ampere hours (Ah) is the amount of energy charge in a battery that enables 1 ampere of current to flow for one hour."
"In 2021, NanoGraf announced it had developed the world's longest-running 3.8Ah 18650 cylindrical lithium-ion cell, at 800Wh/L, so this latest version reflects an improvement."
The battery is something called a silicon-anode cell. "A silicon anode battery is a type of lithium-ion battery where the anode is replaced by silicon nanotubes or silicon coating."
They never say what Wh/L stands for. Watt-hours per liter? Ok, so, you all know your metric units, right? Watts are a unit of power, watt-hours are a unit of energy, liters are a unit of volume, so watt-hours per liter is energy per unit volume, or energy density. So it makes sense.
Who uses this type of battery? Tesla? Brrrrrp! I tracked down the original press release (from May of this year) and it says NanoGraf Technologies sells this battery to the military.
NanoGraf's Li-ion 18650 battery achieves a new energy-density milestone
