The revolutionary lithium-ion batteries in i-SYNERGY machines offer you higher quality performance in a safer, longer lasting package: Battery lifespan of up to 8 years; 5x more performance than traditional lead acid batteries; a non-hazardous solution with less toxic materials than other batteries; reduced costs on battery replacement; charge machine at any time without wasting charging cycles; real time remote tracking; free access to your machine use data; free remote fleet management software. Large facility with a few tight spots? The i28BT is your solution. It too is a fully automated walk-behind scrubber with a 26 gallon solution capacity, an electrical actuator for pad pressure up to 119lb, and a durability-boosting cast aluminum brush deck with a curved squeegee. But it also has a 28in cleaning width, allowing for spotless floors in your smaller areas. Features: Variable speed traction control Improves working efficiency due to oversized 24 gal solution tank State-of-the-art, user friendly touch panel control system Cast aluminum brush deck and curved squeegee Variable pad pressure up to 119lb No tools needed for changing squeegee blades Delayed vacuum motor shut off Emergency shutdown system Working efficiency up to 31,000 square feet/hour 25A On-board charger Two 13" Pad holders included