Batteries are pretty convenient though. They don't have any moving parts and can supply electricity on demand. Not all lithium batteries are created equal in

Batteries are pretty convenient though. They don't have any moving parts and can supply electricity on demand. Not all lithium batteries are created equal in terms of longevity. A traditional lithium manganese battery might have 500 cycles in it before hitting 80% capacity. A lithium titanate [1] battery might be closer to 5000 cycles. A battery could be designed for long term usage and thus lower the long term cost, if not the upfront cost. [1] https://en.wikipedia.org/wiki/Lithium%E2%80%93titanate_battery https://en.wikipedia.org/wiki/Lithium%E2%80%93titanate_batte...