Yes, but also he has found it to be a bugger just to get the seat on right sometimes due to the contact it makes with the battery. What would it cost, a couple of ounces for some kind of strap on the battery? I'm all for shaving weight, but only if it makes sense. As noted above with the Yami regulator, it bolts to a bracket, which in turn is bolted to the frame. Makes sense to bolt directly to the frame instead of having the bracket, but I do believe the bracket also acts as a retainer to hold the electrical wires passing by the left side of the steering head so I kind of get why they did that.
Sounds like he has an aftermarket battery that is bigger and the rubber mounting strap doesn't fit anymore and since the seat comes in contact someone figured that would be a suitable restraint.