Tips: It's recommended that the battery should be fully charged and discharged 3 times after you receive the battery. For transport safety, our batteries are not fully charged before leave the factory. After use, please charge the battery after cooling. Always remove battery form your tool when you are assembling parts, making adjustments, cleaning,or when not being used for an extended time. Store it in a clean, dry, cool place away from heat and metal objects. Battery charger is not included.