Hi thanks for the help
I’ll tell you the whole story of my predicament
I had completed all four batteries in the lightning temple ,got on lift with Roku and ascended to the boss level .
Having failed to beat her ,having only four hearts and little stamina wheel I decided to venture out into the world to compete more shrines so as to increase my heart/stamina levels and also collect more weapons.
On my return to the lightning temple I was greeted by Riju,got on lift to ascend to continue to boss and found I was only 75%powered up ,only to discover the fourth battery wasn’t powered up now cannot do so , the switch is down in the fourth battery room and riju can
not fire it up I have five prior autosaves but only one for the lightning temple ,thanks for any help you can give me