zhè kuài / diàn chí / de / é dìng / róng liàng / shì / èr shí / ān péi xiǎo shí / shì hé / gěi / xiǎo xíng / shè bèi / gōng diàn

这块电池的额定容量是二十安培小时，适合给小型设备供电。

This battery has a rated capacity of twenty ampere-hours, making it suitable for powering small devices.