Bosch BAT 6120 battery charger

The Bosch BAT 6120 is a two-in-one unit for car workshops: a charger for lead-acid and lithium batteries, and a power supply with up to 120 A continuous current. Its charging characteristics are updated over USB.

You can use it on a desk, a table or the floor, mount it on the wall, or even place it under a car in the showroom. The charger has charging, supply and buffer modes. The large LCD has 4 backlight colours and a wall-mount mode, and you operate it with four buttons. A QR code on the display opens the BAT 6120 Help Center. The menu is available in 26 languages.

Technical data

• Battery types: UNI, WET, EFB, AGM, VRLA/GEL, LFP (LiFePO4)
• Charging functions: 12 V lead-acid charging with charging diagnostics; 12 V lithium charging with BMS wake-up
• Max charging current 12 V: 120 A
• Continuous DC output: 120 A (at AC 120-240 V, 25 °C)
• Max output power: 1.75 kW
• Supply mode: 12.0-13.2 V adjustable, default 12.6 V; power limit 10-30 A adjustable, default 20 A
• Buffer mode: 12.0-13.2 V adjustable, default 13.5 V; max 120 A continuous
• Charging cable: 3 m (double wire), cross-section 25 mm²
• Power input: 120-240 V AC (US/EU); 100 V AC (JPN)
• Mains voltage: 220-240 V, 50/60 Hz
• Battery nominal voltage: 12 V
• Operating temperature: 0 °C to +40 °C
• Protection class (DIN 40050): IP 20 D
• Weight without charging and power cables: 8.5 kg
• Dimensions (W x H x D): 329 x 116 x 433 mm