Well, there are numerous options for chargers/cables - I have the older model of the Ventev charger shown below, which has two standard USB ports (so separate cables would be needed, whether the 30-pin or the lightning variety) - output is 5V & 2.1Amps, so can easily charge two iPads @ once; plus the extra amperage will not harm smaller i-Devices - I've often used this 'on the road' to charge my iPad & iPod simultaneously (you'll just get a faster charge on the iPod or the iPhone).