1 received defective, the engine did not work, thanks to Amazon's service for the return and forwarding correct. The second working properly, it will charge in about 10 seconds (97dB, avoided use late ^^) So you can move with, not power, but do not expect 4 inflated tires or blow bcp thing autonomy reserve 2litres allow blowing qq seconds. to the levels of motorcycle / car / bike cold, it's perfect.
