Ever wondered what's actually happening inside that sealed torpedo when you squeeze the trigger on a dive scooter? In this episode, we break down the complete propulsion system behind diver propulsion vehicles, from battery chemistry to brushless motors to propeller physics. Whether you're thinking about adding a DPV to your kit or just curious how they manage to tow you and 80 pounds of gear across two miles of reef without dying, this is the deep dive into the engineering that makes it possible. You'll walk away understanding why certain specs matter and how to plan dives around real-world battery performance.

• Lithium-ion batteries give you way more power for way less weight than the old lead-acid packs. They deliver about 150 to 250 watt-hours of energy per kilogram, which is like comparing a backpack full of textbooks to a singl ...