Charging speed matters not the port.
R17 have a memory card slot and 3.5mm jack. The one not having memory card slot and 3.5mm jack is the R17 pro.
no one uses memory card these days if internal is sufficient.
Reason why Sony aren't selling well because of some new china phone brand like Oppo, which is more affordable and have more features where you can't see in Sony brand.
I am currently using this phone.....Oppo R17 has Dual 4G Sim slot....no memory card slot....even its not Hybrid....you can not insert any memory card in this.....