The RockBoard Power Block is a compact power supply, delivering current for 10 effects pedals.  Besides 8 x 9 V (150 mA each) output, the Power Block has 2 x 18 V (400 mA each) outputs as well.  This power supply provides 2,000 mA total output and comes with 10 connection cables as well as a mains adapter.
 
Can also be used for your mobile phone.