no extended batteries will work on this cradle. not on the phone and not in the extra slot. the slot is way to thin. It fits a standard battery so snug and tight.
that's the sylicrilic by incipio. great double layer protection. adds some thickness, but not as much as you would think for a double layer case. comes in 4 different color schemes
totally forgot to mention some specifics. charges relatively fast. probably as fast as the stock wall charger I believe. there are also two cables. one for data transfers to computers and one for just power.