Dive computer battery and o-ring spec's

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I couldn't specifically find the Aqualung i300 dive computer in this listing, but the o-ring for the case is a 2-026 70 duro 1.25 X 1.375 X .0625 buna o-ring available on Amazon in 10 packs (identical to the one I purchased from Aqualung for 10x the price)..
 
Looking for o-rings for a GEO 2 and I have seen several sizes mentioned. The reference chart v1.5 lists it as a 1.2 x 27mm and a post last year has it at 1.3 x 27mm. does anyone have any experience on which one is correct?
 
Looking for o-rings for a GEO 2 and I have seen several sizes mentioned. The reference chart v1.5 lists it as a 1.2 x 27mm and a post last year has it at 1.3 x 27mm. does anyone have any experience on which one is correct?

No, but considering the difference between 1.2mm & 1.3mm cross section is less than 4 thousandths of an inch I think either should be fine.
 
Looking for o-rings for a GEO 2 and I have seen several sizes mentioned. The reference chart v1.5 lists it as a 1.2 x 27mm and a post last year has it at 1.3 x 27mm. does anyone have any experience on which one is correct?
I used 1.3 x 27mm on a GEO 2. It works fine, no leaks after 10 dives down to 100' depth.
 
Hello,

I have searched the forum but have not been able to find the O-ring size for an Oceanic Datamax Pro computer. This is the Datamax Pro with the J battery not a Pro Plus. It appears to be a metric o-ring. Does anyone know the o-ring size for this computer?

Thank you,

John
 
Hello,

I have searched the forum but have not been able to find the O-ring size for an Oceanic Datamax Pro computer. This is the Datamax Pro with the J battery not a Pro Plus. It appears to be a metric o-ring. Does anyone know the o-ring size for this computer?

Thank you,

John
?? The manual for the DataMax Pro does not show a J battery.
 

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https://www.shearwater.com/products/teric/

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