why aren't we using these? 12V batteries

[choklitlove]

they're smaller, more powerful (?, more voltage at least), and sometimes cheaper.


why not?

[brett]

Hi.
I do use them.
The main problem for me is the lack of suitable battery holders.  If you find some, please post where I can get some.

[choklitlove]

they work okay with no alterations to these DIY circuits?

[choklitlove]

according to data sheets, they are less than 1 mm smaller than standard N size batteries.  at least i think i read them right... have you tried an N size holder yet?


http://www.allelectronics.com/cgi-bin/item/BH-50/970/N-CELL_BATTERY_HOLDER_.html

[Mark Hammer]

We aren't using them because they are really intended for low current circuits.  In general, the bigger the battery volume, the more current the battery can supply.

A suitable place for something like this, however, might be an on-board low-gain or unity-gain FET buffer.  Here, there is typically little current draw, and the couple of extra volts provides a little more headroom.  Plus, the small packag size is a plus for fittin it into potentially awkward or limited spaces.

[cd]

IIRC don't those have 1/10th the capacity of a regular 9V?  Something like 500mAh vs. 50mAh?

[Gilles C]

I use them too, for single Fet or Mosfet preamps in guitars. They are 33mah and I use 2 of them, in a battery holder I found locally, for a 24V supply.

The holders I use have a standard 9V battery snap so I can try them anytime instead a 9V battery for a test.

Gilles

[petemoore]

  Laugh...just tape the copper conductor ends right to the battery, stretch the electrical tape a little.
  More than one?...roll a tube of thin cardboard or even paper around the inline batteries, then stretch the tape around the long way, over the ends, you have your batteries and conductors lined up and pressed together.
  Might sound too simple, but works jez fine.

[Paul Marossy]

A suitable place for something like this, however, might be an on-board low-gain or unity-gain FET buffer.  Here, there is typically little current draw, and the couple of extra volts provides a little more headroom.  Plus, the small packag size is a plus for fittin it into potentially awkward or limited spaces.

That's exactly how I use this sort of battery. It would have been impossible to to get a battery in the control cavity of my Ibanez guitar otherwise. 

This is in a S470FM, very small control cavity...

[aron]

I've never seen these. Are they readily available?

[mdh]

I've never seen these. Are they readily available?

Yes, I bought one recently for my car's keyless entry. They have them at Radio Shack, at least. They're commonly cross-referenced as GP-23A or just 23A.

[aron]

Cool! I will check them out.

[Mark Hammer]

I see them in dollar stores (everything for a dollar) all the time.

[Gilles C]

I found my spare holder and battery.



This one has wires, not the 9V snap connector I mentioned.

If you were to use these batteries inside a guitar, I would suggest that you buy the best ones you can find, the super alcaline ones. You don't want to open your guitar too often.

Gilles

[brett]

Hi.
I've used the 27A type.  I hadn't heard of the 23A.  It has much higher capacity:
12 Volt, 40mAH (23A/A23) or 18mAH (27A/A27) capacity.
23A/A23 max size is 1.122" long by 0.406" diameter, weight 0.26 oz or 7.5 g.
27A/A27 max size is 1.110" long by 0.315" diameter, weight 0.15 oz or 4.4 g.
Long shelf life (up to 5 years).

I use mine in a mini-voltmeter with LCD screen that only draws 1mA (or less).

Thanks for the tip about an N type battery holder.