A significant increase in the resale of rental batteries has been noted in Japan, as society uses more portable electronic equipment. Despite rental agreements stating the batteries should be returned to the original service providers, many Japanese citizens have found more profit in reselling them further. This practice creates issues for rental companies who expected a different turnover, and are now seeing stock shortages. The authorities are working on new measures to counteract this problem.

In Japan, rental battery services are common due to the prevalent use of portable devices, both for personal and workforce use. They're affordable and convenient, bolstering Japan's reputation for efficient energy use. However, recent practices of unauthorized reselling are not only causing economic loss for service providers but also questioning the ethical values related to contractual agreements.

In the United States or the European Union, legal measures are typically stricter and the occurrence of such issues might lead to severe penalties that include large fines or even legal prosecution. Of course, this could vary depending on specific situations and involved parties.