I'm looking for a single multi-purpose usb charger that can charge new (lightning) iphones and ipads, kindles, etc. (ie., I think I need lightning, micro-usb and mini-usb) so as to avoid having to travel with multiple chargers. Retractable would be nice but not necessary. In other words, this, but lighting instead of 30-pin, or this, but mini-usb instead of 30-pin. Swear to G I've searched everywhere to no avail. Any suggestions?