today I have time for installation. They charge while sitting in the case, which you connect to a power supply via the include cable. Ordered size 4, which should have for our little one, but they were huge. The only thing I still want to work on is getting the perfect balance on the ambient sound. Jai aimé son disigne These are nearly 100% identical to the original pads, maybe a SLIGHTLY bit smaller shape, and slightly less round on the sides of the interior circle. Easy to fit, and feel just like the originals. Don?t believe the fact it says ?refurbished? & ?new condition. I ordered a 3B (since they say to size down 2-3 sizes) and they fit very well. So I had to buy another set from another vendor.