This bit has been answered
Does anyone know of a commercial product that will let you charge a phone from a 12V SLA battery? Ideally i'd like a commercial product, not a DIY solution. The reason is I'll probably end up with a fairly large 12V SLA battery as a DC UPS for my ONT/router (20 - 30AH I guess) which in a disaster would easily have enough power to charge my phone as well.
I could use a car cigarette lighter charger in a pinch, with enough alligator clips, but it's not ideal. There is this, but I'd have to mess with it a bit. This looks better but doesn't ship to NZ.
NEW QUESTION: the original question has been answered. See the new question near bottom of p3 - how do I charge an SLA battery using a solar panel with 5V output.