Lithium batteries promise massive weight savings, higher cold cranking amps, and far longer lifespan, but at nearly double the upfront cost, many riders wonder if the upgrade actually makes sense in the real world. After installing and living with a lithium battery on a Harley Softail, breaking down cold-weather behavior, longevity, and true cost over time, let’s watch the video and see whether lithium really beats AGM in the long run.