Lead-acid batteries are cheap and durable and have served us well for more than a century, but these heavy, poison-filled devices are giving way to more energy-dense, non-toxic lithium-ion units. Lithium-ion technology offers a lot of advantages over old-school lead-acid tech, but there are some drawbacks as well. In this video from the MC Garage, Senior Road Test Editor Ari Henning touches on the pros and cons of lithium-ion batteries so you can decide if lithium-ion is right for you.