Tools / Power Tools
Bosch GLI 18V-4000 C Professional Cordless Worklight User Guide
Quick start guide for the Bosch GLI 18V-4000 C Professional cordless worklight, covering battery installation, operation, Bluetooth connectivity, and maintenance.
Table of contents
Quick guide from the manual
The Bosch GLI 18V-4000 C Professional is a portable, cordless worklight designed for temporary indoor illumination. It features Bluetooth connectivity for remote control via the Bosch Toolbox app.
Device description
The worklight includes an LED light source, a supporting leg, safety brackets to protect the light if knocked over, a carrying handle, and a tripod mount. It is powered by an 18V battery and includes a button cell for Bluetooth connectivity even when the main battery is removed.
Operation
To operate the worklight:
- Battery installation: Insert a charged 18V battery into the battery holder until it clicks.
- Switching on/off: Press the On/Off switch repeatedly to cycle through brightness levels: 1st press (dimmed, level 1), 2nd press (dimmed, level 2), 3rd press (full brightness, level 3), 4th press (off).
- Bluetooth control: Download the Bosch Toolbox app, select 'My Tools', and follow the on-screen instructions to connect.
Safety and maintenance
Important safety conditions:
- Do not direct the light beam at people or animals.
- Maintain a minimum distance of 0.2m from all illuminated surfaces to prevent overheating.
- Do not cover the lamp head during operation.
- Remove the battery before any maintenance, transport, or storage.
- The light source is not replaceable; if defective, the entire unit must be replaced.
The worklight is maintenance-free. Clean the glass lens only with a dry, soft cloth; do not use detergents or solvents.
Troubleshooting
If the Bluetooth connection fails, remove both the button cell and the main battery for 10 seconds to reset the module. If the light does not turn on after wireless charging, remove the battery for 10 seconds to re-initialize it.
Manufacturer information
Bosch
Practical help
Common problems
Bluetooth connection cannot be established.
Remove the button cell and the main battery for 10 seconds.
Worklight cannot be operated via Bluetooth despite battery being inserted.
Press the On/Off switch repeatedly until the worklight can be operated via Bluetooth.
Worklight does not turn on after wireless charging.
Remove the battery for 10 seconds to re-initialize it.
Bluetooth PIN is not working.
Reset the PIN to factory settings by removing the button cell and battery for 10 seconds.
Before use
- Ensure the battery is fully charged.
- Remove the separating film from the button cell contact before first use.
- Ensure the worklight is placed on a stable, level surface.
- Check that the battery is securely clicked into the holder.
Specs in practice
- Luminous flux
- Brightness levels: 1000 lm (level 1), 2000 lm (level 2), 4000 lm (level 3).
- Lighting duration
- Approximately 30 min/Ah at maximum brightness.
- Bluetooth range
- Up to 15 meters, depending on environmental conditions and obstacles.
Model compatibility
- Compatible with all Bosch 18V batteries (GBA 18V and ProCORE18V).
- Requires Bosch Toolbox app on Android or iOS devices for Bluetooth control.
Manual page author
David Miller
Documentation analyst
Organizes user manual content into clear summaries, with attention to model details, product context, and everyday usability.