When to change Oceanic Geo 2.0 battery

[anchochile]

Question for my fellow Geo 2.0 owners: if I last changed the battery about two years ago but only have 15 or so dives on it since then and it is not showing a low-battery indicator, am I safe going on a small dive trip (~10 dives) without changing the battery, just bringing a spare with me and changing it if the computer starts to show a low battery indicator?

Related - when you change the battery, does it lose your current tissue loading data? For example, if I change it in the middle of a multiple-day series of dives?

 

[Rilelen]

I would replace it before the trip; I find my Oceanic Geo 2 needs a new battery about once a year, regardless of use. You could just bring a spare but (as you note) it will NOT save your data between battery changes…

 

[CT Sean]

The manual says
"When the battery is removed, settings and calculations for repetitive dives
are retained in the unit's memory while a new battery is installed."
Which I take to mean tissue loading does not reset. I always changed mine before dive trips so I can;t actually confirm this is true.

If you haven't done so recently, I recommend a new o-ring with the battery. Any Geo 2.0 at this point has a pretty old o-ring if it hasn't been changed. I'm pretty sure that's what caused mine to flood a couple years ago

 

[DIVEWATCHDOCTOR]

Yes, definitively install a new O-ring if you change the battery yourself. We never, ever service a dive computer without replacing the O-ring.