With 4AH battery, charge by 12VDC car power & AC power 30L foledable bucket,portable and quited a space ... You can use it anywhere and anytime with battery power. It's a good ai of you when you ... With battery,one charge can last for 1.5 hour running,you can use it anytime, anywhere. Easy to ... charged by 12V Dc or AC power. Smart switch to protect the machine,automaticly run/stop ...