We've come a long way from cellphone battery packs that were as large and heavy as a phone book, but why not add some green to the current batteries?

我们使用大小和重量像电话簿一样的手机电池，已经很有一段时间了，可是，为什么不向目前的电池中加入点绿色元素呢？

youdao

We've come a long way from cellphone battery packs that were as large and heavy as a phone book, but why not add some green to the current batteries?

我们使用大小和重量像电话簿一样的手机电池，已经很有一段时间了，可是，为什么不向目前的电池中加入点绿色元素呢？

youdao