Free Electric Hand Warmer/Stove

Small nine volt heater. Stop at step three for the case and the battery clip.

Step 1: Tools And Supplies

Supplies:

Ni chrome wire or thick steel wool type thing, different thicknesses and lengths heat differently. Some wire will need more voltage to glow red hot.

9 volt battery w/ metal case

Solder

Some kind of adhesive

Tools:

Soldering iron

Utility knife

Flat head screwdriver

scissors

Comments

[Xixfas]

this isnt a good idea

[najito]

thank you very much

[hanlin_y]

It may be safer for you to use a 5W power resistor and mount it to the metal case. That way, you can control the current with I=V/R. 0.5A is okay for AA batteries.

[Lectric Wizard]

Here's a safer way to do this, get a small 12v bulb such at those used on car interior (dome) lights & wire it to an old 9v battery top as you've done here. Safe & cheap,cheap, cheap ...

[dog digger]

If your worried of explosions (which I doubt) you could use a resistor of the right value.

[Wesley666]

terrible idea. Shorting a battery can make it explode emphasis on EXPLODE

[chuckr44]

I believe all batteries sold in the US are required to have vents to vent gasses outward to prevent "kasplosions". This includes AA, AAA, C, D, and 9v batteries. Older batteries do not have vents, which is probably where you got this idea.

[NatNoBrains]

!EXPLODE!

[Wesley666]

I still wouldn't trust it...safety concern, but it is a good idea other then that...

[ReCreate]

9-volt battery 101 the 9 volt battery has a thick metal casing,worst case scenario:the battery leaks acid

[LaxLuvr]

Thats why I said Not emphasis on Not to leave the battery attached to the heater

[Wesley666]

Yes but what if it !EXPLODES! in your hand/glove or anywhere else some might put this.

[LaxLuvr]

Then I hope you have insurance and/or a spare hand!

[Wesley666]

Unless your a guy and want so warmth down there then you better have another one of those.

[LaxLuvr]

ROFL!

[Wesley666]

Oh ya and !EXPLODE! if you didn't get that from above.

[Derin]

¡EXPLODE!

[boredinventa]

just connect 2 nine volts together with a switch in between faster and easier but be careful because it does get super hot and will burn you very badly if used incorrectly.

[mm405416]

I realize that this would add cost and detract the ratio of recycled materials, but isn't there some sort of IC you could put in line and would complete the circuit in pulses so that you could leave the battery attached for significantly longer?

[LaxLuvr]

Thats a good idea but considering I'm 13 and don't know too much about electronics I would have to learn more about electronics if I wanted to do that.

[dodo91]

im 13 too!

[theghillieman]

I am 13 too

[Wareagle]

(removed by author or community request)

[ThaNorwegianDude]

Im 15 too! LOL

[ichisato]

D: im 15 and im a soffomore !!!!!!!!

[Evilthingamabober]

 IMA SCATMAN!

[BluePhenox]

no you aren't

[Evilthingamabober]

 (cries for a while)
WELL YOU'RE NOT REALLY ROB!!!!!!

[Uforic Invasion]

I might be one of the only people in this thread that understands this... i feel old... yet wise??

[fire bat]

your not alone man ^^

[ThaNorwegianDude]

wtf random :P

[Markolise]

Research into 555 timers I once saw a guys website that used one of these to power a mini Tesla coil. It used a 555 timer, transformer, 2 9v batteries, and a ceramic capacitor bank. Worked rather well in my opinion :D Just a thought

[luvit]

i once made a hand warmer. i took two 9v batteries and plugged the sockets into each (plus to minus). i did a lot of things during church service when i was young. i don't know why i had two 9v batts at church.

[conrad2468]

lol prob for the wireless mics!

[luvit]

in 1986 church mics without wires were unheard of... or it was a mic in need of wires.

[conrad2468]

back-n-the-day....ha ha ha ha ha!

[junits15]

how hot does this actually get? i have made several 3 or 4 watt heaters using resistors, and they aren't shorting the battery.

[LaxLuvr]

I don't actually know how hot it gets. I like your idea! I have used a resistor to make a putrid stink machine but it was a real pain trying to find one that reached a high temperature, especially when powered by a nine volt battery. I hope this helped to answer your question and if you have any tips on how I could improve my idea I would appreciate them.

[junits15]

to improve it, you could use some nichrome wire it is a much better heating element than the steel wool

[conrad2468]

better.......a COIL of nichrome...just make sure its insulated....