当用户将它戴在手臂上时，它就会利用重量与磁能系统向蓄电池发电。

Attached to the users arm, they employ a system of weights and magnets which provide an electric current to top up charge in a storage battery.

youdao

该电路适用于蓄电池负载，无需储能电容，满足了车载充电机在体积重量方面的要求。

The circuit is suitable for being connected to the load of storage batteries, and no storage capacitors are needed, it also meets the requirement of volume and weight for on-board charger.

youdao

绑在用户的手臂上，采用一个重量与磁性的系统，利用电流给蓄电池充满电。

Attached to the user's arm, they employ a system of weights and magnets which provide an electric current to top up charge in a storage battery.

youdao