I work in a two story building that has a chairlift. I cannot tell you how may times it has had to have the battery replaced and ‘reset’, usually costing about $500 a time. There are teenagers downstairs, and even when you educate them about leaving it alone, new ones come in the next school year and fool around with it. A couple of years ago I read a news article about a block, perhaps in the Eastern suburbs, that had a small lift put on the outside of the building to benefit an owner.