Leaving a Li-ion battery charging unattended can lead to a failure Holiday breaks are a time to rest, recharge, and step away from our buildings. Unfortunately, preventable fires do  occur , often in empty schools, offices, and other facilities. One of the most common and overlooked risks is lithium-ion battery chargers left plugged in  during extended closures. Why This Matters Lithium-ion batteries are everywhere: laptops, tablets, radios, power tools, e-bikes, scooters, dr