EnerSys is proud to celebrate the 100th anniversary of its IRONCLAD® batteries!  The square tubular design of IRONCLAD batteries exposes more surface area of the positive plates to the electrolyte, which delivers higher sustained voltages and more work capacity than round or flat plate designs throughout the discharge cycle. We call this increase in work capacity the Ironclad Effect and it means you can rest assured that you’ve got the battery power you need to get the job done!