Unload before stop the machine, or there will be left magnet. Next time when use, magnetize with accumulator cell or dry cell battery.

停车前要先卸去负载最后停车，如果带负载停车，可能引起剩磁，下次使用时要用蓄电池或干电池重新充磁。

youdao

This article introduces the pollution of the environment for the waste and used battery, and waste dry cell is used and handled of comprehensive, good results has been achieved.

介绍了废旧干电池对环境的污染，及其综合利用与处理的方法，取得了较好的效果。

youdao

But building a giant battery using dry-cell technology would require thousands of individual cells - about the size of a soft drinks can - to be strung together in a massive installation.

BBC: Liquid metal promise for future batteries

Johnson cut open a 12-volt dry-cell battery and crammed in two more cells in an attempt to get another 4 volts.

FORBES: Royal Boom