This is an original Shearwater product.
replacement battery cover with O-ring,
This fits Shearwater PETREL WITH RADIAL SEAL.
Please take note of the type of cap you already have, there are 2 types and they are not compatible with each other.
SEE BELOW ON HOW TO IDENTIFY THE TYPE YOU HAVE.
A radial style chassis has the letters “RC” (radial cap) etched on bottom.
A crushed style chassis does not have these letters.
The radial cap has an extra step at the back of the cap.
we try to hold stock of all products, but if showing out of stock there may be a few days wait while new stock arrives.