Profile: PERMA Battery Co., Ltd. designs and builds custom battery packs. Batteries are required to provide higher energy density to meet the needs of ever smaller and lighter devices. Moreover, the attention being focused on protecting the environment has resulted in demand for products that are environmentally friendly. So, this new technology of rechargeable lithium battery is trending and capable to replace the traditional sealed batteries. Lithium primary batteries can provide long shelf life in normal temperature and be operated over a wide range of temperatures, with high energy density and steady discharge performance, widely used for both consumer and industrial applications.