Airsoftonlineshop.com is not responsible for batteries that have been damaged as a result of improper operation, storage, misuse or abuse, accident or neglect, such as physical damage resulting from misuse; contact with liquid, water, rain, extreme humidity or heavy perspiration, sand, dirt or the like, extreme heat, or food; use of the battery for commercial purposes or subjecting the battery to abnormal usage conditions, or other acts which are not the fault of Airsoftonlineshop.com. Make sure you understand how your battery should be used and how long it should be charged. If you have any doubt regarding the operation, charging, or storage of your battery and/or charger, please ask service staff of Airsoftonlineshop.com. A charging battery should not be left unattended and should be picked up periodically while charging to check for overheating. Do not charge batteries near flammable material.