A primary cell is a battery (a galvanic cell) that is designed to be used once and discarded, and not recharged with electricity and reused like secondary cells (rechargeable batteries).
A specialty battery is a power solution in a specialty device or system with the designation of a specific purpose. Whatever your specialty device needs, SFB has the specialty batteries for your replacement. .
Critical systems are systems of batteries which must be highly reliable and retain this reliability as they evolve without incurring prohibitive costs. There are four types of critical systems: safety critical, mission critical, business critical and security critical.