I was having battery connection issues w my EM5 mk 1, cleaned the battery contacts w rubbing alcohol and cotton bud, now works properly.
For wi-fi file transfer, i use Toshiba Flashair, works well for me.
I'll give the "cleaning contacts" a try as well. Thanks.
I added a sticker to the bottom of my battery flap and it does seem to help with the connection.
As for the wifi transfer, I thought the EM5 doesn't natively support the Toshiba Flashair?
Does it mean that the card works but you have your wifi on all the time?
With the eye-fi card, there is a setting in the menu that allows you to switch the wifi on or off on the eye-fi card.
Another option I've found but not tested is to get the shuttersnitch app for ios to replace the eye-fi app.
I might keep my EM5 and not "upgrade" to the GX85 or EM10 mkii after all.