Portable phone charger using RC lipos?

[MTBikerTim]

Hi Everybody

Long time no post.

I have a question and I think you guys have the knowledge to answer it.

I want to be able to plug some of my lipos into a bec and plug them into my phone so I can basically have a portable charger for my phone. What I would like to have though is a low voltage cutoff and maybe even a fuse. Anyone know of a small bec that has a low voltage cutoff built in or a separate cutoff that I could use?

Note to castle. Add a low voltage cut off to your becs. I know it would be dangerous in RC use but just add lots of warnings or difficult to switch on.