Yes. The BATLOGGER M can also be operated with the AC adapter plugged in. If no electrical outlet is available, we recommend the StrongBox with their additional batteries to extend the autonomous runtime up to 153h. It is also possible to connect an other suitable power source as a 12V lead accumulator. Please note the following power requirements: 9-15 VDC, min. 5 W, 2.1⁄5.5mm connector type (e.g. S760, attach positive pole to the inner short solder terminal).