When working with lithium-ion batteries on the job, always plug the charger directly into the wall. Do not charge multiple batteries or devices on a power strip or adapter. Only use listed and approved chargers and batteries. If a battery is damaged or no longer works, know how to dispose of the battery properly. Never dispose of the battery in the regular recycling or trash as it can cause a fire. Visit www.call2recycle.org to find a battery drop off point.