Yet bolivia happens to hold enormous quantities of lithium .

而玻利维亚则碰巧因此拥有数量巨大的锂资源。

Lithium is a test case .

锂的开采正是一次考验。

They have rechargeable lithium polymer batteries and are completely wireless .

他们是有可充电的锂聚合物电池并且是完全无线的。

The core of each sphere is a crystal of lithium iron phosphate .

每个小球的核都是一个锂磷酸铁晶体。

And new challenges for lithium batteries are opening up in green energy .

在绿色能源中，锂电池也受到了新的挑战。