I bought this battery as a replacement battery in September 2013, and she also worked. Unfortunately, now after about 30-40 charges. (In principle use the original battery) it charges to 100%, but at 5% discharge (ie at 95% charge) my S4 passed into nirvana and I need to connect the battery to the original operating system to start again. The battery may not tolerate the current heatwave. :-(
Update 20/06/2014
Now I have received from HandyNow a free replacement for the replacement. :-) 5 stars first for the company. The new battery also fits better into the battery compartment. I'll use it now times as the main battery to see if the problem occurs again, rather do not think there probably is a different production series (fit).
