Power / Batteries Chargers
Bosch GAL 12V-40 Battery Charger User Manual
Quick guide for the Bosch GAL 12V-40 battery charger, covering setup, wall mounting, charging process, troubleshooting, and maintenance.
Table of contents
Quick guide from the manual
The Bosch GAL 12V-40 is a professional battery charger designed for Bosch Li-Ion batteries. This guide provides essential information for safe operation, installation, and troubleshooting.
Charging process
Ensure the mains voltage matches the specifications on the charger's rating plate. The charging process begins automatically when the charger is plugged into a power outlet and a battery is inserted into the charging bay (1). Charging is only possible if the battery temperature is within the permitted range of 0–45 °C.
Wall mounting
The charger can be used on a flat surface or mounted on a wall. To mount on a wall, drill two holes 72 mm apart. Use round-head screws with a diameter of 5 mm to 6.5 mm for secure attachment.
Troubleshooting
- Battery not charging: If the red temperature/error indicator (2) flashes, the charger has detected an internal error. Ensure the battery is fully inserted, unplug the charger, and plug it back in. If the error persists, contact an authorized Bosch service center.
- Indicators not lighting up: If no indicators light up, check the power outlet, mains cable, and the charger itself. Verify the mains voltage.
Maintenance and cleaning
To avoid safety hazards, if the power cord needs replacement, it must be performed by Bosch or an authorized service center for Bosch power tools.
Manufacturer information
Bosch
Practical help
Common problems
Battery not charging and red indicator (2) flashes
Ensure the battery is fully inserted. Unplug the charger and plug it back in. If the error persists, have the charger checked by an authorized service center.
No indicators light up
Check the power outlet, mains cable, and charger. Verify the mains voltage.
Before use
- Check the charger, cable, and plug for damage before every use.
- Ensure the mains voltage matches the charger's rating plate.
- Verify the battery temperature is between 0–45 °C.
- Ensure the charger is placed on a non-flammable surface.
Specs in practice
- Charging current
- 4.0 A
- Battery charging voltage
- 10.8–12 V (automatic detection)
Images and diagrams
- (1) Charging bay
- (2) Red temperature/error indicator
- (3) Green charge indicator
Model compatibility
- Only for Bosch Li-Ion batteries with a capacity of 1.3 Ah or more.
- Do not charge non-rechargeable batteries.
Manual page author
David Miller
Documentation analyst
Organizes user manual content into clear summaries, with attention to model details, product context, and everyday usability.