edit I am an idiot, who uploaded the image link as the URL. The original source should now be accessible
RMIT engineers say they’ve tripled the energy density of cheap, rechargeable, recyclable proton flow batteries, which can now challenge commercially available lithium-ion batteries for capacity with a specific energy density of 245 Wh/kg.
The battery uses dark matter, it’s effectively an alternative to nuclear fusion, so the use case would be in space stations rather than yout phazer set to stun.