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BAT 645 – battery charger

BAT 645

BAT 645

BAT 645 Detail

BAT 645 Detail

BAT 645
BAT 645 Detail

The universal BAT 645 is designed to charge all battery types, including: lead-acid, maintenance-free, standard, gel, fleece, AGM, EFB and Lithium Iron Phosphate (LFP) batteries. Using its soft charging phase, the BAT 645 can automatically charge heavily-depleted batteries.

Featuring as standard, both a backup mode, maintaining voltage supply to buffer data during battery replacement (e.g. for car stereos, supply and control units, etc.) and floating mode, to keep the SOC of the battery and stabilise the vehicle’s electrical system when the engine is off. In floating mode, the battery charger can support the on-board power supply during any control unit updates.

More Information

  • 45 A of continuous current output is able to charge all types of 12 V and 22 A for 24 V battery: Truly universal charging
  • Soft charging phase: For heavily depleted batteries
  • Backup mode: Maintains voltage supply to buffer data during battery replacement
  • Floating Mode: Power supply support during control unit updates
  • Dot matrix display in 18 languages: Clear measurement readings
  • USB port keeps battery charger software up-to-date: For futureproofing
  • Charger holder for wall mounting: Convenient for extended charging periods
  • Compact: Only 220 (w) x 115.5 (h) x 296mm (d) for space saving in the workshop or in transit
  • Robust housing: Durable for daily use
Max. Charge current intensity
-12V
-24 V

45 A
22,5 A
Max. Charge current intensity
-12V
-24 V
Length of the charging cable

45 A
22,5 A
2 x 3 m
Max. Charge current intensity
-12V
-24 V
Cross-section charging cable

45 A
22,5 A
6 mm²
Max. Charge current intensity
-12V
-24 V
Power input

45 A
22,5 A
Max. 800 W
Max. Charge current intensity
-12V
-24 V
Weight (without charging and power cable)

45 A
22,5 A
3,7 kg
Max. Charge current intensity
-12V
-24 V
Charging characteristic

45 A
22,5 A
I1U1I2aI3aI3...
Max. Charge current intensity
-12V
-24 V
Backup mode

45 A
22,5 A
12.0 V / 24.0 V max. 20 A
Floating-mode operation 13.0 V / 256.0 V max.
45 A / 22,5 A
Floating-mode operation
Function temperature range
13.0 V / 256.0 V max.
45 A / 22,5 A
-5°C – +45°C
Floating-mode operation
Main voltage
13.0 V / 256.0 V max.
45 A / 22,5 A
230 V, 50/60 Hz
Floating-mode operation
Battery nominal voltage
13.0 V / 256.0 V max.
45 A / 22,5 A
12 V / 24 V
Floating-mode operation
Protection type (DIN 40050)
13.0 V / 256.0 V max.
45 A / 22,5 A
IP 20 D
Floating-mode operation
Safety class (DIN 40530)
13.0 V / 256.0 V max.
45 A / 22,5 A
SK I
Floating-mode operation
Dimensions (W x H x D)
13.0 V / 256.0 V max.
45 A / 22,5 A
220 x 115,5 x 296 mm
Floating-mode operation
Emitted interference level (DIN 40839)
13.0 V / 256.0 V max.
45 A / 22,5 A
Class B
  • Battery charger
  • Detachable charging cables
  • Power cord
  • Wall mount
  • User manual
  • Safety instructions
Detachable charging cable, 5 m length, 6 mm² diameter
1 687 011 536
Segment Brochure (PDF)
Fact Sheet (PDF)
Manuals, updates and information