Originally Posted by mike the snake
I deal with lithium batteries all the time with model helicopters, planes, and cars. All that needs to happen is a small hole in the casing, or overcharging, or over discharging, and they go off. They burn like a high pressure flame thrower. Ticking bombs. I know of many people who have had their LiPo batteries ignite while being stored, with nothing going on, no charging, not being used, they just went off out of the blue (internal short), one friend had his garage burned down.
The batteries in the KERS systems are basically overcharged and over-discharged during every race.
Yeah the USPS is starting a ban on the shipping of Lithium batteries overseas starting this wednesday. It kinda sucks for us military folks who are overseas now, but they have more than good enough reasoning for it, as they have been linked to 2 cargo plane crashes since '06.