I'm 5/3/3/3. Itani will only sell me a light battery. As of yesterday (3.5.1), so would serco. However, today, Serco will sell me a light battery, a medium battery and... a free battery? Since when do stations SELL free batteries excpet with ships?

Free batteries are temporarily available at all stations, because there were some stations that didn't offer any batteries at all. (The Itani should be offering the free battery too.)

There'll be a more graceful solution down the line.