I know how many of you inventors have desired a versatile battery holder to power your projects, I know you can't sleep without that... so this strange accessory has born ;-)
This gadget has a simple function, keep a battery inside, and yes you could buy an ordinary plastic black and impersonal battery holder if you want, but keep in mind that this is coloured (you can choose the Sugru colour that you prefere), rubbery and even water resistant (although you can't dive with it...).

Step 1: the Actors

I made it for Li-ion 18650 batteries, because they're very powerful and really versatile for electronic projects, but you can build the same gadget for one or more batteries of any type, voltage and shape.
I've used some metal washers to make contacts, maybe copper pieces should have been better because copper is more conductive... I'll let you know after some test.
<p>Nice idea, one serious issue. Rubber bands like that dry out and crack. You should use some other stretchy material, perhaps bike inner-tubes? They have same issue as rubber bands but less often. Downside is they do have have as much stretch.</p>
Nice, so if I make this and use a usb on the wire end, I can charge my cell phone with 1 double A battery?
<p>usb is 5V, so keep that in mind</p>
<p>stock iphone usb wall chargers put out 3.7v. Perfect.</p>
<p>for the record, this is not correct in the slightest. 5.0V is what they put out. The regulation for the battery is inside the phone, the USB charger is USB standard voltage (some exceptions can apply, and there is some logic communication I'm aware of, some of it just through resistors on the data lines setting the current mAh desires.)</p>
<p>Hi!</p><p>Nice idea but 18650 and the likes have safety vent hole at its positive terminal to prevent explosion due to build up pressure in case of high charging or draining, it is not good to cover those holes shut.</p><p>Cheers</p>
I'm surprised the Sugru didn&rsquo;t' stick to the batteries. Cool stuff.
I've covered the battery ends with some silicon grease, but I suggest to try with oil too...
Great idea! Can see myself using these in future projects, thanks!
This is awesome.
lovely, looking forward to seeing these in your tests :) <br>
I've used it to power the <a href="http://www.instructables.com/id/improved-motorized-gigapan-gear/" rel="nofollow">gigapixel panorama head</a>, it works great, but I needed to add an addictional external stronger tape from a bike tube to keep the contacts tight..
Complimenti finalista!!! :)
ahah I hope Mac Gyver would be proud of me!
Very well done. I like the colors idea as well. I usually just make some universal battery holders by soldering the leads to two small neos. This way, i can use any size battery...AAA, AA, D, C, etc. They hold well and work great...but do not look as cool as yours.
Complimenti per il tuo instructable! <br>Congratulations for this instructable. The design is excellent, whatever the material one uses (Sugru and rubber band type) for crafting. <br>Ciao
Nice!! I did a similar solution but instead of using rubber bands I used plastic tie wraps and water bottle caps, you can see it at: <br> http://www.instructables.com/id/18650-Li-ion-Battery-Holder-with-wire/ <br>Ciao!
that's very interesting, I've always been searching good re-use of plastic bottle caps. Also your other little battery holder is great!
eccezzionale, eccellente idea, complimenti (IT). <br>wonderful idea!
this is a cool idea, but my concern is with how long those rubber bands will last 1, 2 years?
very interessant <br>is it realy waterpropf after rechargin 10 times ?
as 2nup350 pointed out this holder is not properly waterproof, it water resistant, so it means that you can sprinkle water on it, but you can't immerse it. <br>I don't understand what do you mean about recharging...
agree it is always interesting<br>after 10 refills I think that each recharge must remove the battery<br>to put it in the charger and put it back in its holder<br>I am French and at home there is no sugru is what remains flexible<br>when it becomes stiff or hard as epoxy resin ?
this is awesome!
I need to make a multi cell holder and need to know how much sugru it takes to make 1 holder
I've used entirely the two little packets in photo, so it's 5 g for each holder.
Great idea! Thanks for posting.
Great idea.
clever.Good Idea
Nice battery holders. <br>Instead of using the common rubber band, you should try making your own rubber bands from bicycle inner tubes, because they don't degrade as quickly as the common rubber band.
whoops, there already was a suggestion to use bicycle inner tube rubber for the bands.
no problem, it's a good suggestion!
very well done, only problem, we still do not have sugru here in the Philippines..sucks..really still third world..
Buy Sugru online, I think they ship to Philippine too... <a href="http://www.sugru.com" rel="nofollow">www.sugru.com</a>
Great idea! I use the Ultrafire batteries in my very bright flashlight, and they are very good. I also enjoy all the 360 Cities photography on your website - it's beautiful.
Clever solution for odd sized batteries or times when you run out of battery holders.<br> <br> Copper might be more conductive, but that wouldn't make a big difference, as the washers are short (in length) and thick (i.e. compared to the wires), so you might get 15 MilliOhm instead of 17 MilliOhm for the washer. But copper will corode (green copper) and that (the oxide layer) will be a problem as it is a very bad conductor. Stay with your washers.
Thanks for the analysis, very accurate, I'll stay with them :-)
For long term use of the steel washers, May I recommend that you Tin the whole washer with solder to keep it from rusting. Same goes for copper. Also wondering about the electrical properties of stainless steel washers?
Can Sugru really be used for dental implants? <br> <br>http://i.imgur.com/oHpfqAK.png <br> <br>LOL just thought that was a funny ad placement <br> <br>Now we have some uses for all these Canadian pennies
JAJA you almost made me fool! <br>Canadian penny are copper, right?
No, the most recent Canadian pennies are copper plated steel, they replaced copper plated zinc pennies, you need to go back before the mid nineties to find pennies that were mostly (98%) copper.
very good!!!! but sugru is still so expensive!!!!
Hi ... Merely a recommendation. Please be careful when working with rechargeable type batteries, they need to vent when their being charged and when being used under heavy discharge rates. Lastly, ensure that the washer doesn't cause a direct short between the Positive and Negitive terminals. Great idea, keep up the good work. Richard T
Yes, Lithium cells are powerful and it's better pay much attention to avoid shortcuts, I might add a warning in the instructable...
Thank you, were thinking along the same lines. Always Safety First. &quot;Happy experimenting&quot;
Very cool.
I like this Instructable. Good Idea!
water RESISTANT. <br> and use copper washers. <br>good job.

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Bio: I'm an Italian freelance structural engineer, graphic designer and photographer. I'm also investigating electronics, robotics and science in general. I enjoy hacking and ... More »
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