Safety WarningWARNING: Failure to exercise caution while using this product and comply with the following warnings could result in product malfunction, electrical issues, excessive heat, FIRE, and ultimately injury and property damage. NEVER LEAVE CHARGING BATTERIES UNATTENDED DURING USE. NEVER CHARGE BATTERIES OVERNIGHT. Never attempt to charge dead, damaged or wet battery packs. Never attempt to charge a battery pack containing different types of batteries. Never allow children under 14 years of age to charge battery packs. Never charge batteries in extremely hot or cold places or place indirect sunlight. Never charge a battery if the cable has been pinched or shorted. Never connect the charger if the power cable has been pinched or shorted. Never connect the charger to an automobile 12V battery while the vehicle is running. Never attempt to dismantle the charger or use a damagedcharger. Never attach your charger to both an AC and a DC power source at the same time. Never connect the input jack (DC input) to AC power. Always use only rechargeable batteries designed for use with this type of charger in the correct programming mode. Always inspect the battery before charging. Always keep the battery away from any material that could be affected by heat. Always monitor the charging area and have a fire extinguisher available at all times.