Well? Is there anything more you had discovered?
I have a similar problem with my Vita Slim. It goes completely drained, now after 2 days of being unused. I see you're on a stable 3.60-3-65, but I'm on 3.70 HENkaku actually from a long time (was on 3.70 since the 3.70 henkaku went out).
I had no...