Come in a week. It does not work very loudly, you can put pressure to the desired mark. The wheel 29x2.0 from scratch to 3.5 bar pumped for 2:50, while ate approximately 600mA, I mean, a little less than a third. It turns out three such wheels can be inflated from one charge. Charges quite quickly (current in the area of 1A/h) that is, for two hours will be charged. Please note that they can not swing for more than 8 minutes in a row, well, in principle, just in 8 minutes the battery should sit down.