Anything useful to be done lots of half-used 9V batteries?

Factual Questions
1

Just changed all the batteries in the smoke detectors, and I now have 24 barely used batteries (the detectors are all hard-wired in the house, AFAIK the batteries only come into play during a power outage).

Except for a clock radio (again, the battery is for backup), I don’t have anything that uses them. It seems like a waste to just toss them. Is there *anything *I can do with them?

I’m not alone. I figure if I go around the neighborhood on a change-the-battery campaign (maybe sponsored by Duracell), I could amass quite a collection. If collection costs were subsidized, and I had a grant to buy some machinery, could anything useful be done with thousands of them? Hundreds of thousands? Meeeelions?

2

You have 24 smoke detectors? Must be a pain when the battery dies in one and you have to figure out where that forlorn once-every-two-minutes peep is coming from.

3

Might be fun to snap them in a chain and see how badly you can shock yourself (should be around 216 volts).

4

You know they’re made up of AAAA batteries that you can often use in place of AAA batteries, right?

Linky

5

The house was actually built with only twelve. When the previous owners had an alarm system installed, they ended up with a second detector at each location wired into the alarm panel. Oh, and the Peeps are in the microwave.

KneadToKnow - We already have all the extra batteries we need from taking apart the 6v.

6

Radios, flashlights…

7

Put them in a sock for some sweet electrical clubbing abilities.

8

24 smoke detectors?! :eek: I only have one.

You can get a device that will tell you how much charge they have left. Then you can save them to use around the house. Perhaps put them in things like smoke detectors. I mean really, if they are hard wired in, the batteries might have a 95% charge left in them.

Whatever you do, make sure you recycle them at the end of their useful life.

9

You can like them and it feels really funny. That many is a lot for one person but maybe you can have a battery licking party. Most people will get a jolt out of it.

10

Need a battery?

Again, there are only spots for twelve (three bedrooms, office, laundry room, parlor, den, two hallways, stairs, basement, furnace room), but the alarm system doubles that amount. I can’t ignore the non-alarm system ones, since the peep is powered by the main circuit (peep power! Power to the Peeps!).

So I have all this potential energy and nothing creative to do with it? I have to put my plans for world domination on hold.

11

Hook the two ends together and see what happens.

12

But do it outside and run as soon as you do. :smiley:

13

Sooooo, I shouldn’t use it as a belt?

14

Connect them all and give your tongue the ultimate 9V experience. If my math is right, it should give approximately 24 times the fun of one 9V battery to the tongue…

15

A friend of mine has this ancient antique radio that runs on 45 volts DC. He chained 5 together to test it. I think it sucks the juice out of the batteries pretty quickly though.