Do we need to change the o-ring each times that we have to change the battery ? I own a wisdom 2 but never had to change the battery.
RIC R It is always good to inspect / re-grease the o-ring whenever it's removed. Even after a year, it does start to deteriorate. It's a small price to pay to have a good o-ring over a flooded computer!
MICHAEL D Well technically you should only have to change the O ring if it is bad, but it's a good idea to change it each time you change the battery just to be sure. It's cheap insurance IF you do it right. Once you remove the old ring then clean the groves and mating surfaces. Do not use a Qtip that could leave small fibers. I use a foam makeup applicator, the same thing I use for cleaning the o ring on my camera housing. Once clean, apply just a SMALL amount of the lubricant, just a film to help the o ring slide across the mating surfaces easily. Smear some on your fingers and then rub the ring between your fingers, then place the ring, then inspect the surfaces again for fibers, hair, salt particles, sand, anything that could cause a seal breach. Only then should you place the cover back on. Oh yeah, don't forget the new battery before you replace the cover.
MICHAEL B I would because it comes with the battery. Make sure you coat the o-ring with a silicone based lubricant
STEVE S No. I've changed the battery several tomes without changing the o-ring. Just closely inspect it.