Increase in safety and decrease in cost. Spinel manganese is used as a cathode material.

Prismatic

The NEC TOKIN Corporation's prismatic lithium ion rechargeable battery uses spinel manganese as a cathode material. Compared to conventional cobalt type batteries, a battery of this type achieves a resistance to overcharging while sustaining a high level of safety and at the same time supplies stable power. Outstanding safety enables the protection circuit built in a battery pack to be simplified and helps to reduce the overall cost of a power supply system. The prismatic lithium ion rechargeable battery is attracting a great deal of attention as a battery for mobile phones and PDA devices which are required to be increasingly compact and lightweight.
Production of prismatic lithium ion rechargeable batteries was started at the Toyama Plant in Japan in July 1996 and at our Tochigi Plant in March 1999. The engineering team at NEC TOKIN Corporation's headquarters is in charge of the design and development of battery packs, chargers, and applications.