Battery Pack Product Type Battery Pack Series Ventis MX4 Ventis Pro6 For Battery Chemistry Lithium Ion Operating Temperature - Maximum 122 Degrees F Operating Temperature - Minimum -4 Degrees F For Use With Ventis MX4 Ventis Pro6 Output Voltage 3.7V DC Battery Life 20 hr Standards ATEX CSA Certified EAC (GOST-R-GOST-K) IECEX UL Listed