Been looking to batteries price difference and found these. I am particularly after S5, and cheapest proper cover is still around $45 and up. Have not been there so can't say about quality.
i4/4S http://www.ikea.com/aa/en/catalog/products/00318391/
S5 http://www.ikea.com/aa/en/catalog/products/20318390/
S3 http://www.ikea.com/aa/en/catalog/products/40318389/
S4 http://www.ikea.com/aa/en/catalog/products/60318388/
I6 http://www.ikea.com/aa/en/catalog/products/60318393/
i5/5S http://www.ikea.com/aa/en/catalog/products/80318392/
P.S. my first post, please be gentle :-)
P.P.S. even cheaper for eastern states http://www.ikea.com/au/en/search/?query=VITAHULT thanks to michael_123.
650mA output current on the s4 version compared to 2A from the wall charger. Won't these charge incredibly slowly?