External power supply is an adapter that directly uses AC power to power digital cameras for shooting. There are two types of battery external power sources: standard and long-term. Generally speaking, standard machines come with a battery pack that can maintain power for a short period of time (usually around 10 minutes) after a power outage; The long-term model does not come with a battery, but a charger has been added. Users can connect multiple sets of batteries according to their own needs to extend the power supply time. Manufacturers will increase the charger capacity or install parallel chargers during design The improvement principle adopts a small-sized stacked battery as the power supply, and utilizes the principle of series boosting and parallel current increasing to design a portable high-density electrical external power module. In field work, single or multiple modules can be selected for series or parallel use based on geological lithology and exploration depth to meet power supply needs. For ease of use, we have designed a battery box for individual modules, which is equipped with convenient connection terminals, ventilated and breathable heat dissipation holes, etc. to ensure the normal use of the power supply. Conclusion and suggestions for the comparison and analysis of new and old external power sources (1) From the comparison and analysis of resistivity tomography effects, it is found that the new power source has good consistency in the form and location of resistivity anomalies compared to the new power source, and the testing results can meet the requirements of line engineering survey. (2) A new power module has a volume equivalent to 8.4% of the volume of the old power supply, and a mass equivalent to 8%, which has obvious advantages in terms of portability; The same workload can save 25% in labor costs and have good economic benefits. (3) The study only considers the portability of high-density power sources from the perspective of their volume and weight, without delving into the sustainable utilization of power sources. It is hoped that further improvements can be made in future research work
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