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  https://litecomparison.com/tineco-a11-vs-s11/ On the side of the battery pack, there are three blue lights that show how much power is left. As the battery runs out, the lights go from two to one, then one, and then red, which means the battery is about to die. Most of the time, on a single charge, I can usually cover half of my 2200 square foot home. You can charge the battery while it's still attached to the device, or you can take it off and charge it at the top of the wall mount (many users have bought a second battery so they can keep vacuuming while the first one recharges if necessary for a wide space). You can see them in the video. Putting the battery in the charger or leaving it on the vacuum and charging it with the system is very simple. It doesn't take long at all. Make sure that when you hang the vacuum, you do so lightly because you don't know how strong the two screws in a stud are. Hope this helps you answer your question! The Tineco A11 Hero only comes w