Custom Designed ATEX and NiMH Batteries Designed and Assembled by UK Experts, PMBL. PMBL is a UK based Custom Battery Pack Design, Manufacturer and Assembly company that has delivered highly complex ATEX and NiMH Battery Technology Solutions to many UK and European businesses and provided the optimum battery design systems for each of their specific, bespoke business or product requirements. As an advanced technology and design focused, customer oriented, battery pack manufacturer, PMBL take great pride in their ability to provide an industry leading comprehensive battery technology design, procurement and manufacturing process for a wide range of battery applications.