[] ( batteries) a device that is placed inside a car engine, clock, radio, etc. and that produces the electricity that makes it work电池◆I need to recharge the batteries in my laptop.我需要给我的膝上型电脑电池充电。◆battery-powered/-operated用电池供电的／控制的a large number of things of the same type套；一系列；一批；一群◆a battery of aptitude tests一系列能力测验➡ idiom at recharge