The Industrial Strength Upgrade. The Gold package gives you Maintenance-Free 10-Year Engineered Lithium Power. It’s the heavy-duty solution for large buildings or growing shops that have outgrown walk-behinds and need a machine that’s ready to run 24/7 without the constant troubles of lead-acid batteries. The smart, long-term asset for your facility. The easiest to use rider scrubber, the Tennant T7 has the highest retained value with the lowest cost of ownership.