Charge iOS device through mains whilst using data cable with laptop Take two Apple data sync wires:  


Cable 1, which connects the iPad to a laptop USB port, and   
Cable 2, only connected by itself to an iOS data charger socket plugged into the mains, ready to charge any iOS device (not connected to an iOS device)


Is it possible to connect (or solder) the 'power' wires of the two cables (responsible for charging an iOS device) so that the mains can charge the iPad whilst the laptop can transfer data as required to the iPad? Is this feasible without any major complications?
Rather than having to deal with a homebrew solution, why not just purchase an externally powered USB hub? For example, the D-Link DUB-H7 USB hub is able to provide 1.2 Amps through 2 of its 7 total ports (labeled as 'fast charging' ports). There may also be other hubs out there that will offer the maximum 2 Amps per port.