Bosch C70 Charger

Product Overview

The Bosch C70 charger is a versatile battery charger designed for automotive applications. It supports various battery types and voltages, offering multiple charging modes and safety features.

Article Numbers: 0 189 911 070 & 0 189 912 070

Manufacturer: Robert Bosch GmbH, Automotive Aftermarket, Auf der Breit 4, 76227 Karlsruhe, Germany. Website: www.boschaftermarket.com

Charger Components Diagram

The Bosch C70 charger features the following components:

• 1 Charger: The main unit.
• 2 Mounting hook: For securing the charger.
• 3 Power cable with mains connection: Connects the charger to a power outlet.
• 4 Connector charging cables: Cables that connect to the battery terminals.
• 4a Clip connector charging cables: Charging cables with clips for connecting to battery terminals.
• 5 (+) Clamp (red): Positive terminal clamp.
• 6 (-) Clamp (black): Negative terminal clamp.
• 7 Standby indicator: [standby-indicator]
• 8 Mode selection button: Button to cycle through charging modes.
• 9 Polarity reversal protection indicator: [polarity-protection-indicator]

The charger also includes LED indicators for battery capacity (100%, 75%, 50%, 25%), charging status, and mode selection.

Safety Precautions

ATTENTION: Read all instructions before use. If the power cable is damaged, it must be replaced by the manufacturer or a qualified service technician to avoid hazards.

Disconnect the power supply before connecting or disconnecting the battery.

When connecting the battery, connect the positive (+) terminal (red clamp) first. Then, connect the negative (-) terminal (black clamp) to the vehicle chassis, away from the battery and fuel lines. Only then connect the charger to the mains power supply.

When disconnecting, first unplug the charger from the mains power. Then, disconnect the negative (-) clamp from the chassis, followed by the positive (+) clamp from the battery.

WARNING: The power connector must not come into contact with water. Prevent water from reaching the power supply to protect users from electric shock.

WARNING: Explosion and Fire Hazard! Explosive gases may be produced. Avoid flames or sparks. Ensure adequate ventilation during charging. Ensure the area around the battery is well-ventilated.

Use the charger only with 12 V (14 Ah-300 Ah) or 24 V (14 Ah-120 Ah) lead-acid batteries (including EFB, GEL, AGM, and open VRLA types).

WARNING: Do not attempt to charge a non-rechargeable battery.

Keep the charger out of reach of children. This device may be used by children aged 8 and above, and by persons with reduced physical, sensory, or mental capabilities, or lack of experience, provided they are supervised or have been instructed on safe use and associated hazards. Do not allow children to play with the charger. Cleaning and maintenance should not be performed by unsupervised children. For indoor use only.

Environmental Disposal: Dispose of electrical equipment according to local regulations at designated collection centers. Packaging materials are ecological and can be disposed of at local recycling centers.

Operation

3.1 Before Commissioning

1. Read the battery's operating instructions before connecting the charger.
2. Follow the vehicle manufacturer's recommendations if the battery is still connected to the vehicle.
3. Clean the battery terminals. Avoid contact with eyes, skin, or mouth. Wash hands thoroughly after contact with battery terminals.
4. Ensure sufficient ventilation. Hydrogen gas may escape from the battery during charging and maintenance.

3.2 Connection

1. Connect the charger's positive (+) terminal (red) to the battery's positive (+) pole.
2. Connect the charger's negative (-) terminal (black) to the battery's negative (-) pole. Alternatively, connect to the vehicle chassis, well away from fuel lines.
3. Ensure both (+) and (-) terminals are securely connected before plugging the power cable into the mains.

3.3 Disconnection

1. Switch the charger to standby mode by pressing the mode button.
2. First, disconnect the power cable from the mains power outlet.
3. Disconnect the charger's negative (-) terminal (black) from the battery's negative (-) pole.
4. Disconnect the charger's positive (+) terminal (red) from the battery's positive (+) pole.

3.4 Overheating Protection

If the charger overheats during charging, its output power and current will automatically reduce to prevent damage.

3.5 Standby and Polarity Reversal Protection

Standby: The indicator [standby-indicator] illuminates when the device is on or in case of faults.

Polarity Reversal Protection: The indicator [polarity-protection-indicator] illuminates if the clamps are connected incorrectly.

4 Mode Selection

Press the mode selection button to select the desired mode. The LED for the selected mode will illuminate. Charging begins automatically after 5 seconds if no other operation is performed.

Charging Modes

Notes:

• 1) This charger is approved only for batteries with a capacity greater than 14 Ah.
• 2) Maintenance mode can be used to maintain battery voltage when the battery is not used for a long time.
• 3) For regeneration mode, ensure there is no connection between the battery and the vehicle's electrical system.
• 4) In some vehicles, it is important not to disconnect electronic components from the power supply during battery replacement. In such cases, the power supply mode can be used to power the vehicle's electronic components during battery replacement. If the voltage load is less than 7.5 V, the charger switches to standby mode. In this mode, there is no polarity reversal protection.

4.1 Pulse Charging

This is an automatic function that cannot be selected manually.

• Modes 1 and 2: If the battery voltage is between 7.5 V (± 0.5 V) and 10.5 V (± 0.5 V) at the start of charging, the charger automatically switches to pulse charging.
• Modes 6 and 7: If the battery voltage is between 16 V (± 0.5 V) and 21 V (± 0.5 V) at the start of charging, the charger automatically switches to pulse charging.

4.2 Maintenance Charging Phase

The charger has an automatic maintenance charging phase with a maximum charge of 800mA.

4.3 Maintenance Phase

When the battery is fully charged, the "100%" LED illuminates. The charger then enters the maintenance phase to preserve the battery's full charge.

4.4 Memory Function

If the charger is disconnected from the mains during charging, it memorizes the last selected mode. When reconnected to the mains and the same battery type (12V or 24V), the charger will automatically start in the last mode.

Attention: If the connected battery type differs from the last used type (e.g., switching from winter/AGM to standard lead-acid), manually select the mode again to avoid overcharging or damage.

There is no memory function for modes 3 (maintenance), 4 (regeneration), and 5 (power supply).

4.5 Battery Recognition

If the charger is connected to a battery with a voltage between 14.6 V and 21 V, the 12 V and 24 V LEDs will flash alternately. The charger will attempt to recognize the battery voltage through a detection process. After 1-3 minutes, the charger will identify whether it is a 12 V or 24 V battery and switch to the corresponding mode (12 V motorcycle/car or 24 V truck).

4.6 Overwrite Mode

If the charger recognizes a 12 V battery but the user is certain it is a 24 V battery, the mode button can be pressed and held for 5 seconds to switch the charger to a selected 24 V charging mode.

ATTENTION: With the 24 V mode, it is possible to charge a battery with a low voltage of 5.5 V. This could overcharge a 12 V battery and pose risks (increased gassing, explosion, fire) to people and animals.

4.7 Device Protection Function

In case of a short circuit on the charging cable, the fuse (4a) on the cable prevents damage to the device and the system.

Maintenance and Care

Always disconnect the power cable from the outlet before cleaning the charger. The device requires no maintenance.

1. Turn off the charger.
2. Use a dry cloth to clean the plastic surfaces of the device.
3. Never use solvents or aggressive detergents.
4. For safety and proper functioning, repairs must be carried out by the manufacturer or a qualified service technician using original spare parts.
5. For Li-Ion (LiFePO4) batteries, use the Bosch C40-Li or C80-Li.
6. For 6 V batteries, use the C30 C40-Li and C80-Li.

Contact Information

For the EU Version:

Robert Bosch GmbH

Auf der Breit 4

76227 Karlsruhe

Germany

Telephone: +49 0391 832 29671

Email: kundenberatung.kfztechnik@de.bosch.com

For the UK Version:

Robert Bosch GmbH

Broadwater Park,

Uxbridge UB9 5HJ

United Kingdom

Telephone: 0344 892 0115

Email: contact@uk.bosch.com