One year limited warranty. Without a load, rotation is approximately 4,000 rpm. That's typical of the average recreational cyclist. Unique torque sensing mount adjusts automatically for maximum traction and efficiency. The roller, made of a ceramic composite for long life and superior gripping, works well even when wet.
Battery type is starved electrolytes dry cell.
Maintenance Free, Lead-Calcium Grid, Usable and rechargeable in any position. High discharge rate capacity. Deep discharge recovery. No memory effect. There are tons of them out there.