Ii-ion Charger recommendation? USB out/reliable?

I’m looking to get into using Li-ion for my flashlights. Initially I was just going to ask about a plain charger, but it looks like there are chargers with a lot more features now. Are there any chargers that do all this?

  • USB out
  • Compabiltiy with both Li-ion/nimh (Please tell me if this isn’t a good idea).
  • Most importantly: Smart/Reliable enough to not blow up on me. I hope to use this when traveling, and the last thing I need is to start a fire in the hotel room.

I’m planning on using only protected cells, if that makes a difference.