Lithium 9v battery?

Toren

Test conducted.
Took down the battery in a vacuum-sealed bag. Cut it open at 110fsw. There was an immediate stream of bubbles from the contacts, but other than that, nothing. I watched it for a couple minutes but that's all that happened...tiny bubbles, in the brine. I stuffed it back in the bag and into the BC. Dug it out an hour later at about 45fsw and the bubbling had stopped. No leakage, bursting, explosions or anything exciting at all.
Disposed of corpus in rubbish bin.

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"Sh*t does happen, it is our job to keep it a minor annoyance by training, proper gear configuration, emergency skills practice and a survival mindset."
--Ron Micjan

Kyza

Thank you for the results of an experiment well done. I'm glad to hear that he result is no worse at depth as it is at the surface.
Now, any volunteers to try this at depth in an O2 rich enviroment? or will I have do that one myself?

Toren

Oooooh, I'll have to pass on that one.
But I'll come along and film someone else doing it.

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"Sh*t does happen, it is our job to keep it a minor annoyance by training, proper gear configuration, emergency skills practice and a survival mindset."
--Ron Micjan

caveseeker7

Bring a good telephoto lens.

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Cheers
Stefan


Be Water, My Friend - Bruce Lee

Sponsor Lou in Race For Life!

decoweenie

Ken,

Have you tried to use the alkaline 9V battery in the Meg yet using your adapter ?

Based on your numbers above, the Meg consumes about ~100 ma/h (worst case) which gives the 9V alkaline about 3-4 hours - enough for to save dive.

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"...after a while you get bored offering advice to a bull that like to keep butting the fence with its head rather than walking through the open gate..."

- Rebreather World PM

Skipbreather

Hi Phi

I’ve run an ALKALINE 9v battery on the primary side during various test dives. After 4 ½ hours of letting it fire the solenoid under normal swimming demand the under load voltage reading still showed IIRC (was more than 9 months ago) above 7 volts. That battery is still on my bench, waiting for more torture testing and it just now tested 8.58 volts on my Fluke DVOM.

2 caveats. First is that I know you’ve got the Smithers electronics. Mine are APECS 2.01. I’d advise a call to ISC to be certain 9v won’t fry the Smithers ‘leces. Second is I do not know if your Smithers package gives you access to real time voltages.

For those not familiar, one of the really valuable features of the APECS 2.x package is the ‘System Monitor’ page. It gives you the real time battery voltage and the mv seen by the handset for each O2 cell. For the primary side it also gives the voltage of the battery when under firing load from the solenoid.

Hope this helps. How do you like Ron’s Meg?

Best,
Ken

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"Entropy RULES! Enjoy the interim."

decoweenie

Hi Ken,

Thanks, I will. I am glad that you mentioned that since I was under the assumption that yours is also Smithers.

Not as far as I know.

Would be very useful, but I will wait for the APECS 3 while building up my hours on the Smithers lid first.

Thanks, great help.

I have been VERY busy since gotten home with Ron's unit so have not had time to do anything until this week. I have since taken everything apart and cleaned everything very well, reconfigured my existing APD BMCL to fit it and ordered Meg parts to build another one...

So far so good, I am starting to understand what everyone has been raving about the toughness and part quality. Let's see how it dives as soon as we have some good weather...

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"...after a while you get bored offering advice to a bull that like to keep butting the fence with its head rather than walking through the open gate..."

- Rebreather World PM

decoweenie

Well, Steve doesn't know. And knows no one else who might know.

Kevin, do you have any idea ?

Also... Could anyone explain to me how the uncompensation is done on the DS4 first stage for the COPIS that is different than the simple KISS blank-plug ?

Steve said it was different, better and saves manufacturing cost. And he tried to explain it to me, but he lost me completely...

All I got from the conversation was:

• between 30-50 Smithers units manufactured.
• standard answer when someone inquires about the APECS-3 is "6 month, may be".
• supply issue causing delay for COPIS lids. Best case is March for delivery.

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"...after a while you get bored offering advice to a bull that like to keep butting the fence with its head rather than walking through the open gate..."

- Rebreather World PM

warjarrett

Lithium Batteries have one very big problem: they off-gas much more than any other type of battery, even more than lead-acid. So, (if I remember right) they should not be used in sealed environments. They may increase the internal pressure to the point of causing damage, and the gas they create may be caustic or flammable. Now, BEFORE you get too excited about these concerns, let me caution you further: I am not sure I am right about this, they are just vague memories from my days at Pelican Products, where I was a design engineer, and we decided that we could NEVER use lithium batteries in the sealed, underwater flashlights. Please research this concern carefully BEFORE you try a lithium battery in a sealed environment.