PolyPlus's battery may be just that: dip the encapsulated lithium pack into a glass of ordinary water and it produces current that lights up an LED display at the company's conference showcase booth.
Deep Flight II will ideally replace the weights with a stronger lithium-polymer battery, so its thrusters can propel it down, making it more nimble in the water.
“深海飞行2”号将用一个更强悍的锂聚合物电池取代重量，所以推进器能促使其下降，从而在水中更灵活。
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By ensconcing the lithium inside the membrane's seal, the PolyPlus battery reacts safely with the oxygen dissolved in the water and delivers as much as 1,300 watt-hours per kilogram of electricity.