So does the SIXAXIS just randomly turn on to drain battary life?

[TWRoO]

Ok so which is meant to lose charge faster (when not in use) Li-ion or Ni-MH?

(Although my normal Ni-MH batteries have lost most of their charge within a month or two, but which seems to be what twesterms do... so is there no way of making Li-ion batteries last longer like the ones I mentioned)