Shearwater DiveCAN
®
Petrel
DocRevB
63
Changing the Battery
NOTE: A large coin or washer is required for this section�
Turn off the Petrel
It is a good practice to turn off the Petrel before removing the battery� If removed while on, then
there is a small chance (about 1 in 5000) that the deco tissues will be corrupted� The Petrel
detects this using a cyclic redundancy check (CRC), so there is no danger� However, the
tissues will be lost and repetitive dives will need to be planned accordingly�
Remove the battery cap
Insert the coin or washer into the battery cap slot� Unscrew by turning counter clockwise until
the battery cap is free� Be sure to store the battery cap in a clean dry space�
Exchange the battery
Remove the existing battery by tilting the Petrel computer� Insert the new battery positive
contact first. A small diagram on the bottom of the Petrel shows the proper orientation.
Accepted battery types
The Shearwater Petrel can accept a wide variety of AA sized batteries� The Petrel can accept
any AA sized (or 14500 size) battery that outputs a voltage between 0�9V and 4�3V�
Reinstalling the battery cap
It is very important that the battery cap O-ring is clear of dust or debris� Carefully inspect your
O-ring for any debris or damage and gently clean� It is recommended that you lubricate your
battery cap’s O-ring on a regular basis with an O-ring lubricant compatible with Buna-N (Nitrile)
O-rings� Lubricating helps ensure that the O-ring seats properly and does not twist or bunch�
Insert the battery cap into the Petrel and compress the battery contact springs� While the
springs are compressed rotate the battery cap clockwise to engage the threads� Be sure not to
cross thread the battery cap’s threads� Tighten the battery cap until snug� Do not over tighten
the battery cap�