Old But Perfectly Linear Cells

**diverreb** · 26th January 2012, 22:50

Quote: (Originally Posted by Chris at Silent World)

As a last ditch - I have 3 OLD but perfect teledynes you can have with full disclaimer of course. Output and performance was fine last week. You can have them for free.

Above snipped from a different thread...

OK... I just removed three Teledynes from my Breather... They are two years old. They are still spot on after full tests with my cell checker, which I do on a regular basis. AI's of the same age, but never opened, failed. New AI's ordered and on the way....

Maybe I should change my name of Don here...

If the cells are linear up to 2.0 what happens if you use them..... Do they go bad all of the sudden, more so than fresh cells? Is it a gradual decline? Do they just start acting a little flaky?

Why, if they are linear and pass the cell tests can't they be used, as long as you verify them at depth?

I don't do "expeditionary" or deep dives.... Most of what I do is now 140 and shallower... Bailout isn't a problem, should the need arise.

Richie

Dsix36 · 26th January 2012, 23:04

Welcome to my nightmare! It is just a matter of how much risk you are willing to accept. I personally believe that if they are working, then I can still use them. Of course, This does not mean to have all of the cells be 2 years old or from the same batch. You do need some variance in cell dates to be able to validate during a dive (the chances of multiple failures from different batches is much slimmer).

Just remember that listening to an idiot such as myself may very well get your arse dead.

.

**offpro** · 27th January 2012, 04:50

Can you check the response time with your cell checker?

Pawel Szopinski · 27th January 2012, 06:47

The cell will get slower and slower before the MV output slightly increases then it will die shorty afterwards or you might not even spot it and the cell will simply die from one day to another.

**kwinter** · 27th January 2012, 10:53

Same here, Richie. Teledynes from March 2010 still going strong, although cell #3 has become noticiably slower. It can't be long before they start dying, so I'm going to replace one now and every 3 months if I can go that long. I'd rather replace it before there is a problem than wait for it to go bad. Not really a safety concern, but I hate having to scrub a dive.

Ken

Helium_diver · 27th January 2012, 10:55

Ritchie,

Give them to Mike , He can get another 2 years out of them easy.

Helium_diver

**kwinter** · 27th January 2012, 11:00

Oh yeah, thanks Don for the new signature line.

**diverreb** · 27th January 2012, 14:46

Quote: (Originally Posted by Helium_diver)

Ritchie,

Give them to Mike , He can get another 2 years out of them easy.

Helium_diver

Kevin,

I would but he can't get his current cells out... says he never looks at them anyway so why bother replacing them.

Richie

**diverreb** · 27th January 2012, 14:49

Quote: (Originally Posted by offpro)

Can you check the response time with your cell checker?

Not technically, but I can hook my handsets directly to the Cell Checker and see that they respond quickly to the increase in O2. No noticeable lag time.

Richie

**diverreb** · 27th January 2012, 14:51

Quote: (Originally Posted by Pawel Szopinski)

The cell will get slower and slower before the MV output slightly increases then it will die shorty afterwards or you might not even spot it and the cell will simply die from one day to another.

Pawel,

Thanks.... That's what I was looking for....

Richie

26th January 2012, 22:50	#1 (permalink)
diverreb Richie Burr O2ptima FX Join Date: Mar 2007 Location: Dover, DE Posts: 1,463	Old But Perfectly Linear Cells Quote: (Originally Posted by Chris at Silent World) As a last ditch - I have 3 OLD but perfect teledynes you can have with full disclaimer of course. Output and performance was fine last week. You can have them for free. Above snipped from a different thread... OK... I just removed three Teledynes from my Breather... They are two years old. They are still spot on after full tests with my cell checker, which I do on a regular basis. AI's of the same age, but never opened, failed. New AI's ordered and on the way.... Maybe I should change my name of Don here... If the cells are linear up to 2.0 what happens if you use them..... Do they go bad all of the sudden, more so than fresh cells? Is it a gradual decline? Do they just start acting a little flaky? Why, if they are linear and pass the cell tests can't they be used, as long as you verify them at depth? I don't do "expeditionary" or deep dives.... Most of what I do is now 140 and shallower... Bailout isn't a problem, should the need arise. Richie __________________ Richie Burr.... Probing the Deep Blue Seas since 1966!
(Online)

26th January 2012, 23:04	#2 (permalink)
Dsix36 anti-hammerhead rEvo Optima Dolphin Join Date: Aug 2007 Location: Deerfield_Beach, Florida Posts: 3,433	Re: Old But Perfectly Linear Cells Welcome to my nightmare! It is just a matter of how much risk you are willing to accept. I personally believe that if they are working, then I can still use them. Of course, This does not mean to have all of the cells be 2 years old or from the same batch. You do need some variance in cell dates to be able to validate during a dive (the chances of multiple failures from different batches is much slimmer). Just remember that listening to an idiot such as myself may very well get your arse dead. .
(Online)

27th January 2012, 04:50	#3 (permalink)
offpro Supporting Member Megalodon, rEvo, FGT Join Date: Dec 2006 Location: Up North, Norway Posts: 420	Re: Old But Perfectly Linear Cells Can you check the response time with your cell checker? __________________ -Mats-
(Online)

27th January 2012, 06:47	#4 (permalink)
Pawel Szopinski It's Hammertime! Hammerhead Megalodon, Inspiration Join Date: Feb 2008 Location: London, United Kingdom Posts: 760	Re: Old But Perfectly Linear Cells The cell will get slower and slower before the MV output slightly increases then it will die shorty afterwards or you might not even spot it and the cell will simply die from one day to another. __________________ Hammerhead CCR Instructor Hammerhead Repair Facility Golem Gear Dealer www.silentthrill.com
(Offline)

27th January 2012, 10:53	#5 (permalink)
kwinter Down to no good Optima GEM Join Date: Sep 2005 Location: NJ - USA Posts: 1,506	Re: Old But Perfectly Linear Cells Same here, Richie. Teledynes from March 2010 still going strong, although cell #3 has become noticiably slower. It can't be long before they start dying, so I'm going to replace one now and every 3 months if I can go that long. I'd rather replace it before there is a problem than wait for it to go bad. Not really a safety concern, but I hate having to scrub a dive. Ken
(Offline)

27th January 2012, 10:55	#6 (permalink)
Helium_diver Kevin Hagerich KISS Classic ccr dolphin Join Date: Feb 2005 Location: Baltimore MD USA Posts: 173	Re: Old But Perfectly Linear Cells Ritchie, Give them to Mike , He can get another 2 years out of them easy. Helium_diver
(Offline)

27th January 2012, 11:00	#7 (permalink)
kwinter Down to no good Optima GEM Join Date: Sep 2005 Location: NJ - USA Posts: 1,506	Re: Old But Perfectly Linear Cells Oh yeah, thanks Don for the new signature line. __________________ Ken Quote: (Originally Posted by Dsix36) Just remember that listening to an idiot such as myself may very well get your arse dead.
(Offline)

27th January 2012, 14:46	#8 (permalink)
diverreb Richie Burr O2ptima FX Join Date: Mar 2007 Location: Dover, DE Posts: 1,463	Re: Old But Perfectly Linear Cells Quote: (Originally Posted by Helium_diver) Ritchie, Give them to Mike , He can get another 2 years out of them easy. Helium_diver Kevin, I would but he can't get his current cells out... says he never looks at them anyway so why bother replacing them. Richie __________________ Richie Burr.... Probing the Deep Blue Seas since 1966!
(Online)

27th January 2012, 14:49	#9 (permalink)
diverreb Richie Burr O2ptima FX Join Date: Mar 2007 Location: Dover, DE Posts: 1,463	Re: Old But Perfectly Linear Cells Quote: (Originally Posted by offpro) Can you check the response time with your cell checker? Not technically, but I can hook my handsets directly to the Cell Checker and see that they respond quickly to the increase in O2. No noticeable lag time. Richie __________________ Richie Burr.... Probing the Deep Blue Seas since 1966!
(Online)

27th January 2012, 14:51	#10 (permalink)
diverreb Richie Burr O2ptima FX Join Date: Mar 2007 Location: Dover, DE Posts: 1,463	Re: Old But Perfectly Linear Cells Quote: (Originally Posted by Pawel Szopinski) The cell will get slower and slower before the MV output slightly increases then it will die shorty afterwards or you might not even spot it and the cell will simply die from one day to another. Pawel, Thanks.... That's what I was looking for.... Richie __________________ Richie Burr.... Probing the Deep Blue Seas since 1966!
(Online)

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