I don’t know how anymore since I sold my Spark and I don’t have anything to attach the battery to. I deleted the old screenshots I had because I thought I sold it but the sale fell through. You had liked one of my old threads so I’m guessing you saw it before I deleted it.
Not that I'm interested in the deal but the eBay link members leave never go to the product advertised, but it does go to a drone related page of sorts.