The Bosch Flexible Power System let's you choose minimum weight or maximum run time

Features: Bosch 18636-02 36V Bosch Brute Tough 1/2" Hammer Drill/Driver w/ 2 Fat Pack Batteries

• Flexible Power System - Match battery to application. Fatpack (2 included) for 36 volt power and maximum runtime. Slimpack (optional) for 36 volt power, less than 14.4V weight.
• Litheon 36V batteries The most advanced Li-ion battery available today allows more battery charges, and longer run times.
• Brute Tough Construction with Unibody Powertrain,
• Hammer On/Off Ring Easily engage and disengage Hammer Mode
• High Torque Mode Produces over 600 in.-lbs.
• Externally Accessible Brushes For brush replacement in as little as 2 minutes
• Ratcheting, Carbide Tooth Single Sleeve 1/2" Chuck For one-handed bit changes
• 15-Position Clutch
• Bosch Designed Powertrain with Metal Gears
• Litheon Fast Charger Charges 36V batteries to 80% of capacity in 30 minutes

Specifications: Bosch 18636-02 36V Bosch Brute Tough 1/2" Hammer Drill/Driver w/ 2 Fat Pack Batteries

• No Load RPM -- 0-450 and 0-1,500
• No Load BPM -- 18,000
• Torque -- 600 in./lbs.
• Weight
  • 6.1 lbs. with SlimPack (w/o Assist Handle)
  • 7.2 lbs. with FatPack (w/o Assist Handle)
• Rating 36V

The Bosch 18636-02 Includes:
• (1) Carrying Case • (1) Double-ended Bit • (1) Litheon Fast Charger
• (2) Litheon 36V FatPack Batteries • (1) 360° Auxiliary Handle