Hi, All -
I'm working on an Arduino project that will be powered more or less like a cordless phone: drop it in a cradle and it'll charge, but pick it up and it'll run off the batteries.
To do this, I bought an Adafruit USB/DC LiPo charger and a 2200mAh LiPo battery. Seemed like it'd work on paper... I don't have a lot of experience with LiPos, though, and since this project will be a gift, I'm a little concerned about safety. I don't want to inadvertently start a fire with a LiPo if I can help it.
I recently learned that it's possible to use off-the-shelf NiMH batteries for a similar purpose instead:http://tomtor.blogspot.com/2012/09/solar-powered-arduino-and-attiny.html
So... two questions.
1) Am I being overly-paranoid about the safety of LiPo batteries given that I have the Adafruit-made charger?
2) Would NiMH batteries be simpler/easier to work with? Seemed like the schematic in the link above called for a pretty minimal setup, and I could swap out the solar panel in that project with a 5v source.