My 10 month old all-stock 2013 jazz 1.5V wouldn't start today too. I jump started it using a Nissan Sentra + jumper cables, then I took it to Honda Shaw.
As of this posting, I found out I have 2 other friends that encountered Jazz 1.5V dead battery problems too! Both of them below 1 year old yung car when it happened. According to other horror stories in this thread, apparently hindi lang pala sa amin nangyayari ito.
Honda Shaw said they will check electrical system (if the electricity consumption is excessive due to defective parts), or if it's the battery. Most likely it's the battery sabi ni Franco of Honda Shaw. I'll get the replacement tomorrow if that's the case.
Good news is that it's all under warranty and I don't have to pay a cent.

Had my 2014 Altis repaired by Tireman PH in Gen. Trias, Cavite last Wednesday. Nawala na yun...
rack and pinion repair