Received this vacuum cleaner today (renewed) 10.8V lithium battery. The 10.8V battery is a bit concerned. I don't care about battery life, they are interchangeable. I just needed suction power. I tested this device in a car wash. Before that I had 4 cordless handheld vacuum cleaners. This is no match for them. This is a true black hole, it's sucking in everything it can and can't. Impossible to believe. I am very happy that I bought it. If it breaks, I'll buy another one. I rarely write reviews but when I tried it I couldn't resist. 5++++