Newest model for the HVC Hard Hat Cooler Attachment series. Introducing the MINI rechargeable lithium ion battery (LIMINI01), which is half the size of the regular rechargeable lithium ion battery, but with the same output. Lighter, smaller battery means more mobility and less fatigue. 12 Hours per charge on standard power. This cooling hard hat neck shade comes in high visibility colors for those working outdoors and with a full brim hard hat. Clips on to your hard hat brim in seconds! Prevents heat related illness on the job. The fan attachment sends air into the hard hat to release heat and humidity that builds up in the hard hat. At the same time providing an intense cooling feeling in and around the head, as well as the the face and neck area. With the rechargeable lithium ion battery that is included in this package, you will not have to worry about changing batteries. In addition, you will get more airflow (250% more than the AA battery type) and 12 hours of continual usage at the standard setting. (With the hard hat cooler neck shade, turbo setting is not recommended due to increase in fan noise) Battery life is about 700 to 1000 charges (3 to 4 years) Additional Details ------------------------------ Bullet point: Newest model for the HVC Hard Hat Cooler Attachment series. Introducing the MINI rechargeable lithium ion battery (LIMINI01), which is half the size of the regular rechargeable lithium ion battery, but with the same output. Lighter, smaller battery means more mobility and less fatigue. 12 Hours per charge on standard power. Product description: Newest model for the HVC Hard Hat Cooler Attachment series. Introducing the MINI rechargeable lithium ion battery (LIMINI01), which is half the size of the regular rechargeable lithium ion battery, but with the same output. Lighter, smaller battery means more mobility and less fatigue. 12 Hours per charge on standard power. This cooling hard hat neck shade comes in high visibility colors for those working outdoors and with a full brim hard hat. Clips on to your hard hat brim in seconds! Prevents heat related illness on the job. The fan attachment sends air into the hard hat to release heat and humidity that builds up in the hard hat. At the same time providing an intense cooling feeling in and around the head, as well as the the face and neck area. With the rechargeable lithium ion battery that is included in this package, you will not have to worry about changing batteries. In addition, you will get more airflow (250% more than the AA battery type) and 12 hours of continual usage at the standard setting. (With the hard hat cooler neck shade, turbo setting is not recommended due to increase in fan noise) Battery life is about 700 to 1000 charges (3 to 4 years)