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?