NO BATTERY, M12 Compact charger and power source included Key Features Advanced Heat Technology System with Quick Heat Function: 3X faster heat up time Battery Pass-Thru: Position the battery in the Front or Back Pocket to improve comfort All Day Run-Time: Up to (12) hours of run-time with the M12™ REDLITHIUM™ 3.0 Compact Battery Pack on low setting 3 Heat Zones: Chest, Back and Shoulders One-touch LED controller with (3) heat settings per zone (High, Medium, Low) Maximized Storage with 5 Total Pockets: (2) hand pockets, (1) right chest zip pocket, (1) left chest drop pocket, (1) low-profile battery pass-thru pocket for front or back placement Re-engineered AXIS™ Ripstop Polyester Fabric and High-Wear Zone Reinforcement protects from abrasion and prevents tears from spreading Wind and water resistant with DWR coating 100% Polyester insulation keeps heat in, doesn't add bulk Adjustable waist to improve fit and comfort Washer and dryer safe 100% Polyester