Measuring Tool Power Supply
The measuring tool can be operated either with conventional non-rechargeable batteries or with a Bosch lithium-ion battery.
Do not use any commercially available rechargeable batteries (e.g. nickel metal hydride).
- Use only the chargers listed in the technical data. Only these chargers are matched to the lithium-ion battery of your measuring tool.
Note: Lithium-ion rechargeable batteries are supplied partially charged according to international transport regulations. To ensure full rechargeable battery capacity, fully charge the rechargeable battery before using your tool for the first time.
If the rechargeable battery is removed from the measuring tool, its state of charge may be indicated by the green LEDs of the battery charge indicator on the battery.
Press the button for the battery charge indicator 
or 
to show the state of charge.
If no LED lights up after pressing the button for the battery charge indicator, then the battery is defective and must be replaced.
Note: Not all battery types have a battery charge indicator.
Battery model GBA 18V...
LED | Capacity |
|---|---|
3× continuous green light | 60–100 % |
2× continuous green light | 30–60 % |
1× continuous green light | 5–30 % |
1× flashing green light | 0–5 % |
Battery model ProCORE18V...
LED | Capacity |
|---|---|
5 × continuous green light | 80–100 % |
4 × continuous green light | 60–80 % |
3 × continuous green light | 40–60 % |
2 × continuous green light | 20–40 % |
1 × continuous green light | 5–20 % |
1 × flashing green light | 0–5 % |
Protect the battery against moisture and water.
Only store the battery within a temperature range of −20 to 50 °C. Do not leave the battery in your car in the summer, for example.
Occasionally clean the ventilation slots on the battery using a soft brush that is clean and dry.
A significantly reduced operating time after charging indicates that the battery has deteriorated and must be replaced.
Follow the instructions on correct disposal.
It is recommended that you use alkaline manganese batteries to operate the measuring tool.
Put the batteries into the battery adapter (22). Make sure that the polarity is correct and corresponds to the diagram on the battery adapter.
- The battery adapter is intended only for use in designated Bosch measuring tools and must not be used with power tools.
Always replace all the batteries at the same time. Only use batteries from the same manufacturer and which have the same capacity.
- Take the batteries out of the measuring tool when you are not using it for a prolonged period of time. The batteries can corrode and self-discharge during prolonged storage in the measuring tool.
To replace the batteries/rechargeable battery, move the locking mechanism (2) of the battery compartment cover into position 
and open the battery compartment cover (1).
Insert either a charged rechargeable battery (24) or the battery adapter (22) with fitted batteries into the battery compartment until you feel it click into place.
To remove the rechargeable battery (24) or battery adapter (22), press the release button (23) and pull the rechargeable battery or battery adapter out of the battery compartment. Do not use force to do this.
Close the battery compartment cover (1) and move the locking mechanism (2) into position 
.
The battery charge indicator (d) will indicate the state of charge of the batteries/rechargeable batteries on the display:
Indicator | Capacity |
|---|---|
| 60 − 100% |
| 30 − 60% |
| 5 − 30% |
| 0 − 5% |
If the batteries or rechargeable battery are empty, a warning message will appear for a few seconds and the status indicator (12) will flash red quickly. The measuring tool will then switch itself off.