Amazon has the NomadPlus Generation 1 for $14.95 (39.99 – 25.04 instant savings) with Free Shipping for a limited time. Shipping adds $4.49.

The NomadPlus is an innovative 2-in-1 charging solution. Ideal for travel, it adds an 1800 mAh battery to your Apple USB wall plug (American outlets model) – and it can charge any smartphone or other USB-powered devices. NomadPlus charges your phone first, then recharges its own internal battery, ensuring your phone is ready to go when you are. It works with the US style Apple USB wall plugs (the charger that ships with all models of iPhone) but does not include the Apple wall adapter. This the Gen 1 model. The main difference from this and the newer model is that the battery status indicator lights are green instead of white, and that the lights themselves are slightly dimmer.