It seems there is/was a 576Wh battery version of the S5 as well as the two smaller versions (see attached image). I really liked the idea behind the i5, I wonder if @Jason McNeil is going to carry the S5 as well, and in this larger capacity? I don't see any mention on ewheels.com yet.
http://www.iamips.com/s5/
https://ipselectricunicycle.com/s5/
Recently Speedyfeet-Ian said in his Video Podcast, that he will not have ANY Ips Wheel...the contact/service experience of the producer/IPS on the I5 was such bad quality and that bad, that it wasnt even worth thinking about offering the Ips s5or any other IPS wheel again. And normally he is more diplomatic :-)