Just wanted to update, I've been using CentiZen's battery for about 3 weeks and it has breathed new life into my Solo. Very easy to install and works as advertised, I never got this many sessions from the stock battery. It seems like it heats up faster as well. Very happy, thanks!
I did have a conversation with him on this site. In the end he ended up refunding me through paypal and I bought his battery from planetvape. They fulfilled the order in one day and I should get it tomorrow. So a few hiccups but if the battery works as advertised I am happy.