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Internal Batterys for Dynon and VM1000

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dean.psiropoulos(at)veriz
Guest

Posted: Tue Jan 29, 2008 6:54 pm Post subject: Internal Batterys for Dynon and VM1000

Anyone know what battery Dynon uses for (internal)backup power? Make model

size etc?  If you get one from the factory they cost an arm and a leg

($125.00) and I know they must be available from my local battery mart for a

LOT less.



Same question on the internal battery for a legacy (monochrome LCD screen)

VM-1000 DPU?  I haven't opened the DPU but since all the battery in there

does is hold up the memory I suspect it's a button cell like those in a PC.

Since this model of VM-1000 is now orphaned it would be nice to find

alternate source for the internal battery.  Thanks.



Dean

RV-6A N197DM

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echristley(at)nc.rr.com
Guest

Posted: Wed Jan 30, 2008 6:53 am Post subject: Internal Batterys for Dynon and VM1000

DEAN PSIROPOULOS wrote:

 	  Quote: 	
		   

 Anyone know what battery Dynon uses for (internal)backup power? Make model

 size etc?  If you get one from the factory they cost an arm and a leg

 ($125.00) and I know they must be available from my local battery mart for a

 LOT less.



 Same question on the internal battery for a legacy (monochrome LCD screen)

 VM-1000 DPU?  I haven't opened the DPU but since all the battery in there

 does is hold up the memory I suspect it's a button cell like those in a PC.

 Since this model of VM-1000 is now orphaned it would be nice to find

 alternate source for the internal battery.  Thanks.



   

Take the battery out and carry it over to your local "Batteries-R-Us".  
	


They'll match it up and give you the cheapest price you'll find other 

than surplus.

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mlas(at)cox.net
Guest

Posted: Wed Jan 30, 2008 10:26 am Post subject: Internal Batterys for Dynon and VM1000

The Dynon uses lithium cells with a power protection circuit.  Early in

their production some units were shipped without this power circuit.

Dynon went to great lengths to ensure these improperly manufactured

battery packs were replaced at Dynon's expense.  If your not familiar

with Lithium packs, they will not tolerate over voltage during the

charge cycle.  They will swell and in the most extreme cases rupture and

catch fire.  That is the reason for the protection circuit on the

battery, hence the cost.  I want to say that the cell make up was a four

cell pack.  I would consider using an external battery system with your

own charge controller.



Mike



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frank.hinde(at)hp.com
Guest

Posted: Wed Jan 30, 2008 11:28 am Post subject: Internal Batterys for Dynon and VM1000

Yes I was going to say you can get SLA batteries as small as about 1.2AH from Batteries.com....Simply use a diode to drop the charging voltage to about 12V  (and prevent backfeeding). Then run your Dynon from from this little battery.



Frank.



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