How can I identify what model lift I have?

V-Lifts have V braces on both sides and use one battery.  VSD lifts have two batteries and have a V brace on one side and a Ball Screw Tube on the other side.  For exact model of lift see sticker on corner post.  If no sticker use caliper to measure the thickness of the corner post in the adjustment hole.  V2600 .090, V3600 .124, V4600 .187, VSD3800 .125, VSD5000 .188.