No matter the application, POL-R batteries meet the highest expectations for performance and durability. Factory-sealed and completely maintenance-free, they are engineered to deliver power, long service life, and unwavering reliability—even in the harshest conditions. POL-R is a name you can trust. Our gel-electrolyte models provide excellent thermal stability and strong resistance to deep discharge. Their sealed design is especially well suited to extended use where a constant power supply is required.