如果您使用的是一组全充的AA电池来提供电压和电流，那么它们只能支撑几个小时。

If you use a set of fully charged AA size batteries to provide voltage and current they last only a few hours.

youdao

此外，给nimh蓄电池组充电是个麻烦的过程，因为随着存储电能总量的增加，必须谨慎减少电压。

Also, charging a NiMH battery is a tricky business because the voltage has to be carefully reduced as the amount of energy being stored increases.

youdao

电刺激在假针灸组也会使用，即使是很低的电压量和很短时间的疗程。

Electrical stimulation was also used, although those in the sham group received lower voltage and far shorter treatments.

youdao