Originally Posted by Chap1012
Not to worry. They'll come in handy some day
You will need a soldering iron along with some very little soldering skills when it comes time to replace it...
Not a problem. I have been converting my S107s to have swappable batteries. You could do the same if you want.
For now, I suggest that you just hang on to those spare batteries. If you're interested in the conversion process, let me know, I could show you the details. I did it so the battery is inside the canopy, not hanging between the skids. So, it looks completely like stock. It accepts hobby grade batteries, which I have a handful of. So, I could fly it as long as I want to.