Sorry to dig up an old thread but in case anyone else finds this while googling.Yes you can, at least on a PO-28, Hold write + pattern while installing batteries.
You can use this method for all of the 20 series and the newest 10 series:
Sorry to dig up an old thread but in case anyone else finds this while googling.Yes you can, at least on a PO-28, Hold write + pattern while installing batteries.
You can use this method for all of the 20 series and the newest 10 series: