Wiring batts in parallel

[alekos557]

I wired 2 5v batteries in what I thought was parallel.
pos of one to pos of second, then wired from that pos to switch.
batteries died a spectacular death, I don't believe I even hit the switch.
Batts were NIMH.
Do I need to wire Pos to switch on both?
I'm fine fur will grow back.

 

[Rocketman]

Before connecting two batteries in parallel:
The batteries MUST have the same degree of charge.
Must be of about the same mah capacity and age.
Verify circuit, and do resistance check to verify no shorts prior to hooking up the batteries.
Positive to positive, and negative to negative should not produce any spectacular results

Violate any one of the above, and start shopping for new batteries.

Sorry

 

[alekos557]

I must have screwed something up, Everything was brand new and freshly charged.
Do batts sometimes cook-off when new? A couple of seconds after inserting into mod
one of the batts had split its casing and started "hissing", before I could get the batts
out the second one had split and was also hissing.

 

[mv2envy]

Might have been a short in the mod.

 

[alekos557]

I think you are probably right, just wanted to be sure of the wiring before I try again, parts get pricey.
Thanks for the input...REO works great by the way "mv2envy" Hope you have a good one

 

[TomCatt]

That's one of the reasons I'm still puffing on my Puck - NiMH batt failure isn't all that spectacular
Just sayin'

 

[mv2envy]

I think you are probably right, just wanted to be sure of the wiring before I try again, parts get pricey.
Thanks for the input...REO works great by the way "mv2envy" Hope you have a good one

Glad to hear it!

 

[mv2envy]

You guys might want to give NiZn AA batteries a try instead of NiMh. They have a nominal voltage of 1.6V per cell instead of 1.2V! And they have a much higher discharge rating than NiMh.

8 AA 2800mWh NiZn 1.6V Rechargeable Battery + Multi NiMH NiCd Charger + 2 Case | eBay

 

[TomCatt]

You guys might want to give NiZn AA batteries a try instead of NiMh. They have a nominal voltage of 1.6V per cell instead of 1.2V! And they have a much higher discharge rating than NiMh.

8 AA 2800mWh NiZn 1.6V Rechargeable Battery + Multi NiMH NiCd Charger + 2 Case | eBay

Some have tried them...last I heard the production is ahead of the technology. i.e. they don't last very long, after a few recharges they are kaput. Although I do, on occasion, think about ordering some.

 

[mv2envy]

From what I read, they has fixed those issues.