Battery Question?

sensor330 · 14th July 2007, 01:14

I soldered to 3.6 lithum batteries today for my Meg. When I test them on the volt meter I get 7.2vdc, and when I put them in the Meg I only get a reading of 6.5v. Does anyone know why that is?

Scott

**JPJones** · 14th July 2007, 01:22

Quote: (Originally Posted by sensor330)

I soldered to 3.6 lithum batteries today for my Meg. When I test them on the volt meter I get 7.2vdc, and when I put them in the Meg I only get a reading of 6.5v. Does anyone know why that is?

Scott

Your under load when its in.

sensor330 · 14th July 2007, 01:34

Quote: (Originally Posted by sensor330)

I soldered to 3.6 lithum batteries today for my Meg. When I test them on the volt meter I get 7.2vdc, and when I put them in the Meg I only get a reading of 6.5v. Does anyone know why that is?

Scott

The system monitor shows both when its under load and when its not. Under both readinds show 6.5v.

Scott

**wedivebc** · 14th July 2007, 01:52

Quote: (Originally Posted by sensor330)

The system monitor shows both when its under load and when its not. Under both readinds show 6.5v.

Scott

There are 2 loads involved. The solenoid load is the one the second voltage is measured under but the normal load of the electronics will also affect the voltage and is pretty constant. The 6.5v sounds pretty normal to me.

sensor330 · 14th July 2007, 01:59

Quote: (Originally Posted by wedivebc)

There are 2 loads involved. The solenoid load is the one the second voltage is measured under but the normal load of the electronics will also affect the voltage and is pretty constant. The 6.5v sounds pretty normal to me.

The 5 pack alkaline show more voltage don't they?

tibby · 14th July 2007, 02:22

Quote: (Originally Posted by sensor330)

I soldered to 3.6 lithum batteries today for my Meg. When I test them on the volt meter I get 7.2vdc, and when I put them in the Meg I only get a reading of 6.5v. Does anyone know why that is?

Scott

Oh, I know this!(raised wavy hand)...and to think I don't even have my Meg yet

Ron sent me an FAQ as part of the training packet on how to make your own battery packs and it covers exactly this issue in the second part. Apparently there's a trick. See answer here: http://www.customrebreathers.com/BFaq.pdf
Hope this helps.
Tibby

**JPJones** · 14th July 2007, 02:42

Quote: (Originally Posted by sensor330)

The 5 pack alkaline show more voltage don't they?

yes 2 3.6 volt = 7.2 and 5 x 1.5 = 7.5 volts

SkinAndScuba · 14th July 2007, 22:15

Quote: (Originally Posted by sensor330)

I soldered to 3.6 lithum batteries today for my Meg. When I test them on the volt meter I get 7.2vdc, and when I put them in the Meg I only get a reading of 6.5v. Does anyone know why that is?

Scott

You should not be soldering batteries. If you need to make a battery pack you should be spot welding them together.

Batteries get damaged when you heat them with a soldering iron.

**wedivebc** · 14th July 2007, 22:43

Quote: (Originally Posted by SkinAndScuba)

You should not be soldering batteries. If you need to make a battery pack you should be spot welding them together.

Batteries get damaged when you heat them with a soldering iron.

I've soldered lots of both lithuim and alkaline without any problems. Hot and fast is the best way. I tin the battery, then the wire then quickly join the 2.
Always seems to work for me.

sensor330 · 14th July 2007, 22:57

Quote: (Originally Posted by wedivebc)

I've soldered lots of both lithuim and alkaline without any problems. Hot and fast is the best way. I tin the battery, then the wire then quickly join the 2.
Always seems to work for me.

Ya what Dave said.

I didn't have a problem.

14th July 2007, 01:14	#1 (permalink)
sensor330 Custom Title Allowed! Current Rebreather/s: Megalodon Other Rebreather/s: Not Bought Yet Inspiration Classic Join Date: Feb 2005 Location: Victoria, British Columbia, Canada Posts: 549	Battery Question? I soldered to 3.6 lithum batteries today for my Meg. When I test them on the volt meter I get 7.2vdc, and when I put them in the Meg I only get a reading of 6.5v. Does anyone know why that is? Scott
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14th July 2007, 01:22	#2 (permalink)
JPJones O2ptima Test Dummy Current Rebreather/s: Inspiration Classic Megalodon Sport Kiss Classic Kiss Optima Titan Other Rebreather/s: Join Date: Sep 2005 Location: Florida Posts: 367	Re: Battery Question? Quote: (Originally Posted by sensor330) I soldered to 3.6 lithum batteries today for my Meg. When I test them on the volt meter I get 7.2vdc, and when I put them in the Meg I only get a reading of 6.5v. Does anyone know why that is? Scott Your under load when its in. __________________ NSS/CDS Training Chairman www.jpjscuba.com
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14th July 2007, 01:34	#3 (permalink)
sensor330 Custom Title Allowed! Current Rebreather/s: Megalodon Other Rebreather/s: Not Bought Yet Inspiration Classic Join Date: Feb 2005 Location: Victoria, British Columbia, Canada Posts: 549	Re: Battery Question? Quote: (Originally Posted by sensor330) I soldered to 3.6 lithum batteries today for my Meg. When I test them on the volt meter I get 7.2vdc, and when I put them in the Meg I only get a reading of 6.5v. Does anyone know why that is? Scott The system monitor shows both when its under load and when its not. Under both readinds show 6.5v. Scott
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14th July 2007, 01:52	#4 (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: 1,355	Re: Battery Question? Quote: (Originally Posted by sensor330) The system monitor shows both when its under load and when its not. Under both readinds show 6.5v. Scott There are 2 loads involved. The solenoid load is the one the second voltage is measured under but the normal load of the electronics will also affect the voltage and is pretty constant. The 6.5v sounds pretty normal to me. __________________ Cheers, Dave.... Man is the only animal burdened with the knowledge he will eventually die
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14th July 2007, 01:59	#5 (permalink)
sensor330 Custom Title Allowed! Current Rebreather/s: Megalodon Other Rebreather/s: Not Bought Yet Inspiration Classic Join Date: Feb 2005 Location: Victoria, British Columbia, Canada Posts: 549	Re: Battery Question? Quote: (Originally Posted by wedivebc) There are 2 loads involved. The solenoid load is the one the second voltage is measured under but the normal load of the electronics will also affect the voltage and is pretty constant. The 6.5v sounds pretty normal to me. The 5 pack alkaline show more voltage don't they?
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14th July 2007, 02:22	#6 (permalink)
tibby untitled Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: May 2007 Location: Salt Lake City, UT Posts: 335	Re: Battery Question? Quote: (Originally Posted by sensor330) I soldered to 3.6 lithum batteries today for my Meg. When I test them on the volt meter I get 7.2vdc, and when I put them in the Meg I only get a reading of 6.5v. Does anyone know why that is? Scott Oh, I know this!(raised wavy hand)...and to think I don't even have my Meg yet Ron sent me an FAQ as part of the training packet on how to make your own battery packs and it covers exactly this issue in the second part. Apparently there's a trick. See answer here: http://www.customrebreathers.com/BFaq.pdf Hope this helps. Tibby
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14th July 2007, 02:42	#7 (permalink)
JPJones O2ptima Test Dummy Current Rebreather/s: Inspiration Classic Megalodon Sport Kiss Classic Kiss Optima Titan Other Rebreather/s: Join Date: Sep 2005 Location: Florida Posts: 367	Re: Battery Question? Quote: (Originally Posted by sensor330) The 5 pack alkaline show more voltage don't they? yes 2 3.6 volt = 7.2 and 5 x 1.5 = 7.5 volts __________________ NSS/CDS Training Chairman www.jpjscuba.com
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14th July 2007, 22:15	#8 (permalink)
SkinAndScuba New Member Current Rebreather/s: Optima Other Rebreather/s: Optima Join Date: Oct 2006 Location: South Africa Three Rivers Posts: 39	Re: Battery Question? Quote: (Originally Posted by sensor330) I soldered to 3.6 lithum batteries today for my Meg. When I test them on the volt meter I get 7.2vdc, and when I put them in the Meg I only get a reading of 6.5v. Does anyone know why that is? Scott You should not be soldering batteries. If you need to make a battery pack you should be spot welding them together. Batteries get damaged when you heat them with a soldering iron. __________________ Kenneth Wessels #19799 Skin & Scuba The only South African Optima diver 2007/01-2008/07, and to my knowledge the only Africa Optima diver.
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14th July 2007, 22:43	#9 (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: 1,355	Re: Battery Question? Quote: (Originally Posted by SkinAndScuba) You should not be soldering batteries. If you need to make a battery pack you should be spot welding them together. Batteries get damaged when you heat them with a soldering iron. I've soldered lots of both lithuim and alkaline without any problems. Hot and fast is the best way. I tin the battery, then the wire then quickly join the 2. Always seems to work for me. __________________ Cheers, Dave.... Man is the only animal burdened with the knowledge he will eventually die
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14th July 2007, 22:57	#10 (permalink)
sensor330 Custom Title Allowed! Current Rebreather/s: Megalodon Other Rebreather/s: Not Bought Yet Inspiration Classic Join Date: Feb 2005 Location: Victoria, British Columbia, Canada Posts: 549	Re: Battery Question? Quote: (Originally Posted by wedivebc) I've soldered lots of both lithuim and alkaline without any problems. Hot and fast is the best way. I tin the battery, then the wire then quickly join the 2. Always seems to work for me. Ya what Dave said. I didn't have a problem.
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