When your device is not in use, turn it off! Only transport your lithium–ion batteries in a specifically-designed container. Keep your batteries away from metal and other batteries. Lithium–ion batteries can explode if they are kept in a pocket or handbag and they bump into coins or keys.
Learn why lithium batteries catch fire and sometimes explode and how to. The specifics depend on the battery, but lithium–ion batteries usually contain a metal .