Battery Pack Product Type Battery Pack Series Tango For Battery Chemistry Lithium Ion Rechargeable No Battery Size 2/3AA Operating Temperature - Maximum 122 Degrees F Operating Temperature - Minimum -4 Degrees F For Use With Tango Includes 1.5AH AA/AAA Replaceable Battery Non-Rechargeable Primary Lithium Thionyl Chloride (Li-SOCl2) Battery Output Voltage 3.6V DC Battery Life 3 yr