[SeanLuke]

People have adequately discussed why charging time isn't a particularly significant concern in batteries right now. My concern about these batteries is different: so far as I can tell, they're up to ten times heavier than lithium ion. That's a killer issue for cars. Literature in support of carbon lead claims that this is offset but the cooling and electronics needed for lithium, but I strongly doubt this.

[lotsofmangos]

These aren't carbon/lead. You are talking about a completely different battery technology.

[SeanLuke]

aaaand I am an idiot. Saw a whole bunch of carbon anode lead stories yesterday with similar claims.

[lotsofmangos]

Easy to do given the amount of battery stories at the moment, this one is pretty intriguing though.

"A new company called Power Japan Plus (PJP), working with researchers from Kyushu University, has developed a dual carbon battery (patent pending) that may solve many of the problems associated with Li-ion batteries. PJP’s chief technology officer is Dr. Kaname Takeya, who developed the batteries used in the Toyota Prius and the Tesla, so he knows a thing or two about the shortcomings of Li-ion technology."

http://www.engineering.com/ElectronicsDesign/ElectronicsDesi...