For those wondering: 0.6 grams of lithium out of 45 grams for an 18650 battery, or about 1.3% by weight.
Thanks! I just looked that up and was going to post. Beat me to it!
So it is very different - a li-ion battery anode is a tiny part of the battery. A lead-acid battery, its a much larger component.
Makes we wonder why li-ion AA batteries weigh so much less than Nimh rechargeable. What’s the difference?
All of the nickel maybe?
Hm. There's a lot of lead, in a lead-acid battery. Must be very different.
Even if it wasn't ... If the energy density and mass density of a sodium battery are between lead-acid and lithium-ion, then an equally capable battery would weigh somewhere in-between.