> The lead-acid grid lattice design, still the...errr...gold standard when it comes to the most amount of joules stored per buck, was invented in 1881. Li-ion

> The lead-acid grid lattice design, still the...errr...gold standard when it comes to the most amount of joules stored per buck, was invented in 1881. Li-ion has caught up. If you have $400 to spend on batteries both li-ion [1] and comparable lead acid [2] (deep discharge, long cycle life) cost around 3 Wh/$. [1] https://www.imrbatteries.com/samsung-29e-18650-2850mah-2-75a-flat-top-battery/ https://www.imrbatteries.com/samsung-29e-18650-2850mah-2-75a... [2] https://www.powerstream.com/BBep.htm https://www.powerstream.com/BBep.htm (EP100-12)