How does ODA handle abrupt power loss

Hi Gurus,

Please confirm  if  ODA has battery backed write  cache  to sustain  power failure.

Or rather how does it handle power failure , what we see in the storage realm is that write cache is battery back and it just replay the data from cache once the storage power up. My understanding is that it  relies on ASM to  handle this and the application will only get the commit once it mirrors data to both the plexes or partitions. I would appreciate if anyone can guide me to negate this FUD

Regards

Moncy