I combined one of the Kwikset SmartKey decoder replacement blades and a $5 ebay borescope. Now I can decode SmartKey locks even when the batteries in my primary tool are dead. This
KwikSet SmartKey Decoder -by LockTech
LockTech Kwikset SmartKey Decoder
423) First Look at the Kwikset Smartkey Decoder by Lock Tech - YouTube
How Does The Kwikset Smartkey Decoder Work? - YouTube
LT Kwik Set(R) Decoder
Building a Kwikset Smartkey Tool or: How I Learned to Stop Worrying and Love Hospitality Keys : r/lockpicking