All lithium batteries are not created equal. LiCoO2 batteries indeed have charge-cycle lives in the hundreds, but LiFePO4 batteries (as seen in the Volt, Leaf,

All lithium batteries are not created equal. LiCoO2 batteries indeed have charge-cycle lives in the hundreds, but LiFePO4 batteries (as seen in the Volt, Leaf, etc) can reach 10,000 cycles or more. All this depends on charge/discharge rate, temperature, etc. The Roadster's complicated battery system is required because they used LiCoO2 batteries. :\