It is normal that the battery might be hot when charging.

充电时可能电池有些发热，属正常现象。

youdao

I hear hissing noise from the battery when charging, is that normal?

我听到充电时，电池发出“丝丝”的叫声，正常吗？

youdao

I hear hissing noise from the battery when charging, is that normal?

我听到充电时，电池发出“丝丝”的叫声，正常吗？

youdao