Battery clips short-circuiting battery

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Battery clips short-circuiting battery

Postby matseng » Wed Jan 09, 2013 3:20 am

Dammit Beavis! What the h*ll is going on here? :-)

I got some battery clips to make a 23A battery (a tiny 12 volt battery) -holder for an upcoming project. But when I snapped in the battery in the holders it was short-circuited thru the battery casing by the clips. That seems a more than a little bit unusable to me. How the heck are you supposed to use these clips?!?

23A-clips.jpg
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Re: Battery clips short-circuiting battery

Postby Bertho » Wed Jan 09, 2013 5:21 am

Looks like you have some of these: http://www.keyelco.com/pdfs/M55-prod41.pdf contacts (first page). The shown image on the first page on the right top has an isolating "sleeve" on the battery, as many rechargeable batteries have.

My suggestion is that you crimp some isolation on the battery; a bad hack, but should do the trick.

Most non-rechargeable batteries are metal casing, which suggests that you need a plastic holder or just end-clips with a separate holder mechanism.
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Re: Battery clips short-circuiting battery

Postby matseng » Wed Jan 09, 2013 5:55 am

I'm using these http://my.element14.com/jsp/search/prod ... SKU=908721 clips from Keystone made for AAA & N -size batteries.

Isolating the battery with kapton would work, but that is a hack that is easy to forget when replacing the battery. I've got a bunch of the plastic-type holders as well, but the clips would be a better solution for a PCB mount. http://www.seeedstudio.com/depot/12v-23 ... ?cPath=207

The 23A -type of battery looks more or less the same at both the anode and cathode.

23A-ends.jpg
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Re: Battery clips short-circuiting battery

Postby matseng » Wed Jan 09, 2013 5:59 am

If I put a large warning text on the PCB silk layer saying "ISOLATE THE BATTERY OR IT'S DEAD JIM" maybe I'll remember to do it :-)
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Re: Battery clips short-circuiting battery

Postby Bertho » Wed Jan 09, 2013 6:44 am

matseng wrote:If I put a large warning text on the PCB silk layer saying "ISOLATE THE BATTERY OR IT'S DEAD JIM" maybe I'll remember to do it :-)

You are suggesting that people read warning signs. A bad mistake.

Hazardous options invite experimentation, or is that just me ;-)
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Re: Battery clips short-circuiting battery

Postby Bertho » Wed Jan 09, 2013 6:51 am

matseng wrote:I'm using these http://my.element14.com/jsp/search/prod ... SKU=908721 clips from Keystone made for AAA & N -size batteries.

Yep, keystone part nr. 82, that is the PDF I referred to.

matseng wrote:Isolating the battery with kapton would work, but that is a hack that is easy to forget when replacing the battery. I've got a bunch of the plastic-type holders as well, but the clips would be a better solution for a PCB mount. http://www.seeedstudio.com/depot/12v-23 ... ?cPath=207


But that one is not mountable on a PCB. I think Keystone has PCB mountable plastic holders too or at least with one isolated end. But they are probably prohibitively expensive.

matseng wrote:The 23A -type of battery looks more or less the same at both the anode and cathode.

The designer(s) of that battery did a great job in fail. I've used it too and must conclude that that both price and format are a bad choice for battery.
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Re: Battery clips short-circuiting battery

Postby matseng » Wed Jan 09, 2013 8:24 am

I might end up using two cr2032 holders instead and put two cr2016 in each. That will be 12 volts as well and give me almost double mAh's as well, 90 instead of about 50.
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Re: Battery clips short-circuiting battery

Postby bearmos » Wed Jan 09, 2013 8:58 am

matseng wrote:I might end up using two cr2032 holders instead and put two cr2016 in each. That will be 12 volts as well and give me almost double mAh's as well, 90 instead of about 50.


Ironically enough, distributor bought cr2016's will probably be less expensive that most of the a23's you can find too.
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Re: Battery clips short-circuiting battery

Postby matseng » Wed Jan 09, 2013 9:09 am

Yes, it wouldn't surprise me... I think the cr2016 option is the best.

But I can get "One Hung Low" -brand 23A's locally at the Mr D.I.Y store for the equivalent of $0.63, but they're probably only like 10 mAh or so...
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Re: Battery clips short-circuiting battery

Postby Bertho » Wed Jan 09, 2013 9:27 am

matseng wrote:But I can get "One Hung Low" -brand 23A's locally at the Mr D.I.Y


Is that an Asian name or a punchline? Can't seem to distinguish the two... :-D
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Re: Battery clips short-circuiting battery

Postby matseng » Wed Jan 09, 2013 9:31 am

One Hung Low is Dave@eevblog's generic name for cheap Chinese crap products, Mr D.I.Y is an actual chain of stores in Malaysia selling cheap, but mostly half-decent, products.
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Re: Battery clips short-circuiting battery

Postby vimark » Wed Jan 09, 2013 9:38 am

@ matseng: I lol'ed when you mentioned the one hung low brand for cheap stuffs

@Bertho: the one hung low was on Dave's EEVblog #216 video, when he's evaluating resistors for his Gaussian analysis
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Re: Battery clips short-circuiting battery

Postby Sleepwalker3 » Wed Jan 09, 2013 10:59 am

Funny you should bring this up Mat's, somewhere days ago I saw those holders and thought 'I hate those things, they shouldn't be allowed, so much chance of shorting'. You could try heatshrink over the side clips, but for me I'd just keep riiiiiiiiiight away from them. Keystone do certainly make plastic holders, I spotted some just last night, but not sure if they have them for this specific battery. They did have them for AA, AAA and the tiny AAAA also.
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Re: Battery clips short-circuiting battery

Postby Sleepwalker3 » Wed Jan 09, 2013 11:41 am

What you want is probably something more like this
http://www.keyelco.com/products/prod40.asp
but in 23A (A23,GP23, etc.) size.
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Re: Battery clips short-circuiting battery

Postby Alex555 » Wed Jan 09, 2013 9:16 pm

Couldn't you just put some heat shrink tubing over the clips on the sides?
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