That's shifted in recent years to lithium-ion batteries, which can be made much smaller, with a superior weight-to-energy ratio.

近几年转向了锂离子电池，可以做的小很多，有着超高的重量能量比。

youdao

That's shifted in recent years to lithium-ion batteries, which can be made much smaller, with a superior weight-to-energy ratio.

近几年转向了锂离子电池，可以做的小很多，有着超高的重量能量比。

youdao