Never keep a penny and a 9v battery in the same pocket.  I couldn't figure out why my nipple was so warm until I realized I had done just that.

I don't see what a 9V battery was doing in your pocket Batteries go in stompboxes, not pockets!

I can just hear the Mae West version - "Is that a battery in your pocket, or do you always smoke afterwards?"

Quote from: hodadNever keep a penny and a 9v battery in the same pocket.

That goes double for the Scotsmen keeping 9v batteries and coins in their sporrans!

I've never heard about the penny situation, but NEVER put steel wool and a 9-volt in your pocket. Instant sparks and flame! :shock:

I learned about this trick from an avid backpacker who keeps them in separate parts of his backpack as an emergency fire starter. Maybe this is a good tip for this forum since some people use steel wool to get rid of oxidation on components. Nobody needs a fire in the workshop.

I did this once (and only once I'll tell you). I absent-mindedly put a fresh alcaline 9v in my coat pocket containing a laser pointer. This shorted the battery quite well and when I went to grab the battery from my pocket - yaaeeee!!! - hot as hell - probably near meltdown. Not sure how much current a 9v can supply, but probably several amps briefly shorted like this. If you use Ohm's law I=V/R so I=9/0 (0 ohms shorted).  Bad math so I=9/1 ohm = maybe 9 amps initially and draining the battery very quickly. There's more power in those 9vs than we often give them credit for - just lucky it didn't explode. A learning lesson and reminder for all - even though I did get a good laugh out of it.

I liked the Mae West story, although I don´t smoke.

Good thing to remember to avoid accidents it take off your metal wrist watches and diamond rings before you begin to fix your car. Or your amplifier.

Lithium batteries gan have much energy in small  package, many times more than traditional batteries. There is real risk of fire or some other damage. Few years ago there was much marketing of "10 years" lithium 9V batteries for smoke alarms. Anybody tried those for pedals?

yep i used to use them in everything until i found a better sounding battery.. the dollar general store gold eveready

Quote from: NasseLithium batteries gan have much energy in small  package, many times more than traditional batteries. There is real risk of fire or some other damage. Few years ago there was much marketing of "10 years" lithium 9V batteries for smoke alarms. Anybody tried those for pedals?

I've used 9V lithiums a number of times. I love them!

Not only do they last forever, but they stay much closer to 9V for most of their life than any other battery technology. Highly recommended even at the increased price.

Take care,
-Peter

you can make a great lithium battery in a 9v size that is rechargable and it will last for damn near ever.   radioshack sells them for their cellphone replacement bateries. they are like 4.5v at 2000mah or somethinglike that.