If your bedroom slide goes out much slower than the other sildes, if outside on each end of your bedroom slide, you see 2 stainless steel cables - it is in fact a Norco/BAL electric slide.
It's very common place for smaller, lighter weight slides to be electric. The benefit to you usually results in storage space under the bed. Generally, when the bed slide is hydraulic, there is little or no storage space under the bed.