Meg New Battery Option. Simple, Effective, and no welding

Gilles · 7th February 2008, 01:37

I've split from this thread.
http://www.rebreatherworld.com/offic...tml#post149788

Please note that the following IS NOT factory certified, but only a proven option for me in my relatively remote location.

The above detailed battery pack (in the primary) went on another shallow dive for 2 hours + 3 hours sleep mode, no manual addition so significantly heavier solenoid duty than normal.

After resting for a week, the battery pack voltage went up from 7.9 to 8.5. Did the above diving and pack depleted back down to 7.8 and is back up again to 8.3.

In summary, in the primary the parallelled dual-9V pack has done 4 hours of heavier duty than normal, and seems capable of at least another 2 hours. Pack will stay in for this coming Sundays outing.

Although this is not a long duration option, it does provide much predictability on voltage depletion. I intend to run it down to 7V, and then let it run on the bench to see how much longer it lasts. Any of you welding your own packs may find this an interesting option.

In the secondary, this pack ran for 16 hours (+~12 hrs in sleep).

In manufacturing this battery pack, the batteries are connected in parallell. This means + with + and '-' with '-'. If you connect them in series ('+' with '-') you will create an 18V pack and you will fry

your electronics.

THIS OPTION TO BE EXERCISED AT YOUR OWN RISK

In the hopes that it is useful and safe for you.

Outlaw · 13th March 2008, 19:49

Gilles hi,

i hope you are well. have you done your testing with this set up yet?

do you still use this way?

please let me know. another thought is, due to my upgrading, do you think or have you had any information that this works or not on 2.06? i think there wouldbe no problem as it would be just software, but i thought i might ask.

Thanks.

Spyros

**wedivebc** · 13th March 2008, 21:38

You are aware that by the time the meg warns you of a low battery voltage the 9v battery is stone dead right?

Outlaw · 14th March 2008, 09:26

Quote: (Originally Posted by wedivebc)

You are aware that by the time the meg warns you of a low battery voltage the 9v battery is stone dead right?

Thanks Dave,

yes, i know, thanks for reminding me but i guess it takes a few dives to that that low right? this is why i wanted to ask Gilles.

Gilles · 15th March 2008, 00:17

Quote: (Originally Posted by Outlaw)

Gilles hi,

i hope you are well. have you done your testing with this set up yet?

do you still use this way?

please let me know. another thought is, due to my upgrading, do you think or have you had any information that this works or not on 2.06? i think there wouldbe no problem as it would be just software, but i thought i might ask.

Thanks.

Spyros

I will continue to use this as an option. I'm still using a 2.01 version (that's giving me troubles at the moment). You would have to make sure your 2.06 has potential tolerance to 10V.

Quote: (Originally Posted by wedivebc)

You are aware that by the time the meg warns you of a low battery voltage the 9v battery is stone dead right?

This is true and I have observed something similiar in my bench testing. As the voltage gets below 7V, the amount of current needed to power the solenoid pushes the cells beyond their Ampere providing capacity.

A big mitigation to this however, is the linear, and predictable drop in cell voltage as it gets used up. 6 hours of safe heavy duty usage (to 7V) for an easily replace-able cell is very useful IMV.

What I truly dislike about the Rolls Royce option (i.e. Lithium C cells), is they perform great for a long time, and they suddenly die. Just not comfortable with that fact. I prefer being able to monitor the progression of the depletion, and if I have any doubt, just replace.

Running down until the warning goes off ruins the dive IMV. Prefer to just avoid the whole scenario in the first place.

Outlaw · 15th March 2008, 08:23

Gilles,

have you tried connecting 3 of them in a row? i think they would fit, dont you? that would give a lot more time right?

Thanks

Gilles · 15th March 2008, 08:33

Quote: (Originally Posted by Outlaw)

Gilles,

have you tried connecting 3 of them in a row? i think they would fit, dont you? that would give a lot more time right?

Thanks

If you can get 3 of them (connected in parallell) in the battery box, they will last some 1.5x longer than with only 2.

cedricverdier · 17th March 2008, 14:14

Nice idea Gilles ;-)

Thanks for sharing.

Captain · 17th March 2008, 21:16

Hello,
Nobody uses this type of work?
Personally I made 2 sets of batteries
Easy, no weld on batteries. Same batterie for HSE

Outlaw · 18th March 2008, 10:32

Quote: (Originally Posted by Captain)

Hello,
Nobody uses this type of work?
Personally I made 2 sets of batteries
Easy, no weld on batteries. Same batterie for HSE

Captain,

not to say that this will not work, but i think guys are not fan of the lithium's quick dropage in voltage once it starts to go down...

but, this could be used as a back up method in case you are about to dive and realised your batteries are down.

Thanks.

7th February 2008, 01:37	#1 (permalink)
Gilles Worship the feminine Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Sep 2005 Location: Den Haag (Netherlands) Posts: 761	Meg New Battery Option. Simple, Effective, and no welding I've split from this thread. http://www.rebreatherworld.com/offic...tml#post149788 Please note that the following IS NOT factory certified, but only a proven option for me in my relatively remote location. The above detailed battery pack (in the primary) went on another shallow dive for 2 hours + 3 hours sleep mode, no manual addition so significantly heavier solenoid duty than normal. After resting for a week, the battery pack voltage went up from 7.9 to 8.5. Did the above diving and pack depleted back down to 7.8 and is back up again to 8.3. In summary, in the primary the parallelled dual-9V pack has done 4 hours of heavier duty than normal, and seems capable of at least another 2 hours. Pack will stay in for this coming Sundays outing. Although this is not a long duration option, it does provide much predictability on voltage depletion. I intend to run it down to 7V, and then let it run on the bench to see how much longer it lasts. Any of you welding your own packs may find this an interesting option. In the secondary, this pack ran for 16 hours (+~12 hrs in sleep). In manufacturing this battery pack, the batteries are connected in parallell. This means + with + and '-' with '-'. If you connect them in series ('+' with '-') you will create an 18V pack and you will fry your electronics. THIS OPTION TO BE EXERCISED AT YOUR OWN RISK In the hopes that it is useful and safe for you. Attached Images __________________ Gilles http://www.dirrebreather.com
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13th March 2008, 19:49	#2 (permalink)
Outlaw In search of Law breaking Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Aug 2006 Location: Cyprus, Nicosia Posts: 627	Re: Meg New Battery Option. Simple, Effective, and no welding Gilles hi, i hope you are well. have you done your testing with this set up yet? do you still use this way? please let me know. another thought is, due to my upgrading, do you think or have you had any information that this works or not on 2.06? i think there wouldbe no problem as it would be just software, but i thought i might ask. Thanks. Spyros __________________ CMAS - IANTD - TDI Kamikazi Instrustor Trainer DIRRebreather Team Member ---------------------------- "Once an Outlaw, always an Outlaw"
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13th March 2008, 21:38	#3 (permalink)
wedivebc FIGJAM Current Rebreather/s: Megalodon Other CCR Other Rebreather/s: Not Bought Yet Inspiration Classic Sport Kiss Other CCR Join Date: Feb 2005 Location: Vancouver Island BC Canada Posts: 1,358	Re: Meg New Battery Option. Simple, Effective, and no welding You are aware that by the time the meg warns you of a low battery voltage the 9v battery is stone dead right? __________________ Cheers, Dave.... Man is the only animal burdened with the knowledge he will eventually die
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14th March 2008, 09:26	#4 (permalink)
Outlaw In search of Law breaking Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Aug 2006 Location: Cyprus, Nicosia Posts: 627	Re: Meg New Battery Option. Simple, Effective, and no welding Quote: (Originally Posted by wedivebc) You are aware that by the time the meg warns you of a low battery voltage the 9v battery is stone dead right? Thanks Dave, yes, i know, thanks for reminding me but i guess it takes a few dives to that that low right? this is why i wanted to ask Gilles. __________________ CMAS - IANTD - TDI Kamikazi Instrustor Trainer DIRRebreather Team Member ---------------------------- "Once an Outlaw, always an Outlaw"
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15th March 2008, 00:17	#5 (permalink)
Gilles Worship the feminine Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Sep 2005 Location: Den Haag (Netherlands) Posts: 761	Re: Meg New Battery Option. Simple, Effective, and no welding Quote: (Originally Posted by Outlaw) Gilles hi, i hope you are well. have you done your testing with this set up yet? do you still use this way? please let me know. another thought is, due to my upgrading, do you think or have you had any information that this works or not on 2.06? i think there wouldbe no problem as it would be just software, but i thought i might ask. Thanks. Spyros I will continue to use this as an option. I'm still using a 2.01 version (that's giving me troubles at the moment). You would have to make sure your 2.06 has potential tolerance to 10V. Quote: (Originally Posted by wedivebc) You are aware that by the time the meg warns you of a low battery voltage the 9v battery is stone dead right? This is true and I have observed something similiar in my bench testing. As the voltage gets below 7V, the amount of current needed to power the solenoid pushes the cells beyond their Ampere providing capacity. A big mitigation to this however, is the linear, and predictable drop in cell voltage as it gets used up. 6 hours of safe heavy duty usage (to 7V) for an easily replace-able cell is very useful IMV. What I truly dislike about the Rolls Royce option (i.e. Lithium C cells), is they perform great for a long time, and they suddenly die. Just not comfortable with that fact. I prefer being able to monitor the progression of the depletion, and if I have any doubt, just replace. Running down until the warning goes off ruins the dive IMV. Prefer to just avoid the whole scenario in the first place. __________________ Gilles http://www.dirrebreather.com
(Offline)

15th March 2008, 08:23	#6 (permalink)
Outlaw In search of Law breaking Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Aug 2006 Location: Cyprus, Nicosia Posts: 627	Re: Meg New Battery Option. Simple, Effective, and no welding Gilles, have you tried connecting 3 of them in a row? i think they would fit, dont you? that would give a lot more time right? Thanks __________________ CMAS - IANTD - TDI Kamikazi Instrustor Trainer DIRRebreather Team Member ---------------------------- "Once an Outlaw, always an Outlaw"
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15th March 2008, 08:33	#7 (permalink)
Gilles Worship the feminine Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Sep 2005 Location: Den Haag (Netherlands) Posts: 761	Re: Meg New Battery Option. Simple, Effective, and no welding Quote: (Originally Posted by Outlaw) Gilles, have you tried connecting 3 of them in a row? i think they would fit, dont you? that would give a lot more time right? Thanks If you can get 3 of them (connected in parallell) in the battery box, they will last some 1.5x longer than with only 2. __________________ Gilles http://www.dirrebreather.com
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17th March 2008, 14:14	#8 (permalink)
cedricverdier S21 M.I.B. Current Rebreather/s: Evolution Megalodon Other Rebreather/s: Not Bought Yet Inspiration Classic Inspiration Vision Sport Kiss Classic Kiss Join Date: Apr 2005 Location: Worldwide! Posts: 488	Re: Meg New Battery Option. Simple, Effective, and no welding Nice idea Gilles ;-) Thanks for sharing. __________________ Cedric Verdier PADI Course Director, ANDI-IANTD-PSAI-TDI-DSAT-DAN-NAUI-CMAS Instructor Trainer Trimix (CCR and OC) and Cave Diving Instructor Trainer www.CedricVerdier.com DIRrebreather member
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17th March 2008, 21:16	#9 (permalink)
Captain New Member Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Dec 2005 Location: France Posts: 52	Re: Meg New Battery Option. Simple, Effective, and no welding Hello, Nobody uses this type of work? Personally I made 2 sets of batteries Easy, no weld on batteries. Same batterie for HSE __________________ Jérôme EHIT NPSFQQA #001
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18th March 2008, 10:32	#10 (permalink)
Outlaw In search of Law breaking Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Aug 2006 Location: Cyprus, Nicosia Posts: 627	Re: Meg New Battery Option. Simple, Effective, and no welding Quote: (Originally Posted by Captain) Hello, Nobody uses this type of work? Personally I made 2 sets of batteries Easy, no weld on batteries. Same batterie for HSE Captain, not to say that this will not work, but i think guys are not fan of the lithium's quick dropage in voltage once it starts to go down... but, this could be used as a back up method in case you are about to dive and realised your batteries are down. Thanks. __________________ CMAS - IANTD - TDI Kamikazi Instrustor Trainer DIRRebreather Team Member ---------------------------- "Once an Outlaw, always an Outlaw"
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