Look at the timeline for Lithium-Ion batteries for the reason and where they were in the 1990's. Using very heavy lead acid batteries that you could only really

Look at the timeline for Lithium-Ion batteries for the reason and where they were in the 1990's. Using very heavy lead acid batteries that you could only really use the top 50% of capacity were not economical, which is mostly what they had back then. It was practical in a low speed golf cart that had very few daily miles driven and spent most of its time plugged in and charging, but not much bigger. They also couldn't deliver very high amps compared with what the newer cathodes in LIon and LiFePO4 batteries can generate. Also, none of these technologies were being built at scale in the 90's - they were still mostly inventing the tech and changing rapidly between '90 and 2010ish. https://en.wikipedia.org/wiki/History_of_the_lithium-ion_battery https://en.wikipedia.org/wiki/History_of_the_lithium-ion_bat...