> They are not an option here. And yet they are still the battery of choice by the automotive industry who are also weary of each of your concerns. There are v

> They are not an option here. And yet they are still the battery of choice by the automotive industry who are also weary of each of your concerns. There are very good reasons as to why cars do not have LiPos. > [..] they don't like heat, [..] In terms of thermals they far much better than LiPos (you don't need a heating/cooling system for your lead acid battery). > [..] they don't provide as high currents, [..] The starter motor in your car will sink hundreds of amps during initial turnover, something you will need just a fraction of for an e-bike. Assuming your 12V lead acid battery sags to 9V under load and you're powering a 1kW motor, you're looking at a draw of about 111A, compared to 600A+ from a start motor. Share this across multiple batteries and this also reduces sag. > [..] they can't take as many cycles. In terms of cycles, I've personally found that my car's battery takes 10 years or so to stop turning over the car or holding a decent charge. Given that lead acid batteries are significantly cheaper and can be maintained, exist all over, can be easily recycled and are about to be in massive surplus when we see mass adoption of EVs, they make a lot of sense for a cheap e-bike revolution. > [..] Lead acid batteries are heavy, they are large, [..] > E-Bikes are already too heavy and bulky. As I said, the purpose would not be to cycle the thing. A motorbike for example would be a lot more heavy, yet nobody claims they are non-rideable. Also bare in mind that we are not looking to build the carbon nano tube $100k e-bike of dreams. This is just meant to be a working horse.