Lipo batteries are only dangerous if you do stupid things. Always run a low voltage cutoff, balance charge always, and discontinue use of batteries that have puffed or lost capacity. Always charge the batteries out of the vehicle and inside an appropriately sized fire safe vessel. Don't leave batteries full or empty for extended periods of time.

A good charger is an investment in safety. I reccomend spending the money for an iCharger 406Duo. Really powerful charger that gives you good information on battery health. I've been using lipo batteries for 15 years and because I take safety seriously I haven't had any fires or scares. I've seen plenty of other people disregard the warnings of a failing pack and have a fire.

If you have a cell phone, lap top, tablet, or nearly any other portable electronic device you already have lipo batteries under your roof.